Safety & permits

A short, practical guide to hiking safely and legally in this region.

On this page
  1. 1

    Book through the official authority, not a stranger’s chat group

    Every park on this site links to the government department, state forestry office or park corporation that actually issues the permit. Book or pay through that channel, or through a guide company they officially list, and keep the receipt.

  2. 2

    Check the guide is licensed

    Parks that require a permit usually also require a registered guide, such as Taman Negara, Fraser’s Hill and Gunung Mulu. Ask for the guide’s registration number and verify it with the park office before you pay a deposit.

  3. 3

    Be wary of trips organised only through social media

    A trip that only exists as an Instagram or Threads post, with payment to a personal bank account and no permit reference number, is much harder to verify or get a refund from if something goes wrong. Ask to see the permit or booking confirmation before paying in full.

  4. 4

    Check the season before you go

    Monsoon and rainy-season patterns vary sharply by country: Malaysia’s east coast and Borneo’s interior flood from November to March, Vietnam and the Philippines have their own typhoon seasons, and Japan’s mountains close under snow in winter. The country section further down this page, and every area’s own season panel, states its actual best and avoid months. Always check the current trail status page of the relevant authority on the morning you leave.

  5. 5

    Tell someone your plan

    Share your route, your group size and your expected return time with someone who is not on the hike. For remote multi-day treks, register with the park office as required and carry a means of calling for help.

The pattern to watch for

This is the shape a hiking trip scam takes in this region. It is written from accounts passed between hikers, with every name, group and amount removed, so no individual is described here. If a trip you are looking at follows three or more of these steps, treat the rest of the pattern as likely.

  1. 01

    The trip exists only as a post

    One message in a chat group or one social media post, an attractive price, and a place limit that creates urgency. There is no company name, no permit reference and nothing you can look up.

  2. 02

    Payment goes to a person, not a business

    The deposit is requested to a personal bank account or an e-wallet number, often in a different name from the organiser you have been speaking to.

  3. 03

    The date slips, with an official-sounding reason

    Close to departure the trip is postponed or cancelled, blamed on a permit that was not approved or on the weather. No permit number or authority is ever named, because there was no application.

  4. 04

    The refund becomes a credit

    A refund is promised, then turned into a place on a future trip whose date keeps moving. Each delay is small enough to seem reasonable, and the total time keeps growing.

  5. 05

    Contact thins out

    Replies slow down, the group is closed or the account changes, and the people who paid have no shared record of who else is owed money.

What breaks the pattern

Ask two questions before you pay anything: which authority issued the permit, and what is the reference number. A real organiser answers both in one sentence. Pay into a business account or an official booking platform, keep the receipt, and check a guide licence with the park office rather than with the organiser.

Verify before you pay

0 / 6

Work through this list before you send money for any hike, even one that looks fully legitimate.

Every country has its own law

Permits, fees, guide rules and emergency numbers are set country by country, and in several countries each park adds its own rules on top. This section sets out what actually applies in each of the twelve countries on this site, taken from the same authority pages the trail pages cite.

Malaysia

99917/25

Emergency numbers

  • All services999

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Mount KinabaluSabah, BorneoRequiredMarch to August, the drier seasonNovember to January, the wettest months
Even in the dry season, expect rain most afternoons and near-freezing temperatures at Low's Peak before sunrise.
Taman NegaraPahang / Kelantan / TerengganuRequiredFebruary to SeptemberNovember to January, when the Tahan trek often closes and rivers flood
This is equatorial rainforest, so expect rain at any time of year; the monsoon months bring the highest risk of flooding and leech activity.
Cameron HighlandsPahangRequiredMarch to SeptemberNovember to January, when trails are muddiest and some close after storm damage
Cameron Highlands sits at 1,500 metres plus, so it is cool year round; check current trail status since individual trails close after landslides or fallen trees.
Gunung Mulu National ParkSarawak, BorneoRequiredMarch to SeptemberNovember to January, when Camp 5 and the Pinnacles trail sometimes close after heavy rain
As rainforest, expect rain year round; river levels and trail conditions can change the Pinnacles trek status day to day.
Penang National ParkPenangNot requiredDecember to March, the driest window on Penang's west coastSeptember to November, the wettest months for northern Peninsular Malaysia's west coast
Trails get slippery and river crossings rise during the September to November rains; the park stays open year round.
Bukit GasingSelangor / Kuala LumpurNot requiredYear round, best early morningAvoid straight after heavy rain, when the clay trails get slippery
Kuala Lumpur's climate is fairly consistent year round; the wettest spells usually fall around October to December.
Gua TempurungGopeng, PerakRequiredJune to August, the driest months in PerakOctober to December, when heavy rain closes the river sections
The dry upper galleries stay open in almost any weather. The wet tours follow an underground river and are the first thing cancelled when it rains hard, so check on the morning rather than assuming.
Gua Batu MaloiJohol, Kuala Pilah, Negeri SembilanRequiredJune to August, the driest stretch of the yearNovember to January, and any day with rain forecast upstream
This is a river cave, so the weather that matters is the weather upstream rather than the weather at the entrance. Water inside can rise from waist to chest in minutes after a downpour, and people have been trapped by exactly that.
Gunung AngsiUlu Bendul, Kuala Pilah, Negeri SembilanNot requiredFebruary to August, and always an early startNovember to January, when the trail turns to mud and leeches
Negeri Sembilan gets rain year round with a wetter spell towards the end of the year. Afternoon thunderstorms are common, which is the practical argument for starting at opening time rather than mid-morning.
Upper Baram (Ulu Baram)Ulu Baram, Miri Division, SarawakRequiredMarch to September, when the logging roads are passableNovember to February, when the roads turn and the rivers run high
The limiting factor is not the walking, it is the four hours of logging road between Lapok and the villages. Heavy rain closes that road and no amount of planning gets you past it, which is why trips here are built with spare days rather than tight connections.
Gunung NuangKampung Pangsun, Hulu Langat, SelangorRequiredFebruary to August, and even then only once Sungai Yong has settled after any recent rainNovember to January, when the seven crossings are at their most dangerous
Selangor’s wetter months run from November to January, but on this particular trail the date matters less than the river on the day: Sungai Yong can rise within an hour of rain falling upstream, out of sight of anyone at the trailhead. Afternoon thunderstorms are common even in the drier months, which is the reason for an early start rather than a late one.
Bukit TaburGombak, SelangorRequiredFebruary to AugustNovember to January, and any morning with rain already falling
The quartz itself is the seasonal hazard more than the weather pattern: it is markedly more slippery wet than dry, so a dry morning matters here more than the time of year. Selangor’s wettest stretch still runs November to January, and afternoon storms are common even outside it.
Broga HillSemenyih, SelangorRequiredFebruary to August, for the clearest mornings and the best chance of a cloud inversionNovember to January, when cloud cover often obscures the sunrise entirely
The whole point of the climb is the view, so this is one of the more weather-sensitive hikes on this site: a clear, dry morning after a cooler night gives the best chance of the cloud inversion, while Selangor’s wetter months from November to January bring cloud cover that can hide the valley completely.
Gunung Ledang (Mount Ophir)Gunung Ledang National Park, Ledang District, Johor, on the border with MelakaRequiredMay to September, the driest stretch for this part of southern JohorNovember to January, when the park itself usually closes for the monsoon rather than merely discouraging hikers
Johor National Parks Corporation typically closes Gunung Ledang outright for a stretch of the northeast monsoon, rather than leaving it open but discouraged, so check directly with them before planning a trip in this window.
Bako National ParkBako National Park, Muara Tebas Peninsula, Kuching Division, SarawakRequiredMarch to September, when the sea crossing is calmestNovember to February, when the northeast monsoon roughens the crossing and boats are limited to four passengers at a time
The park stays open year round and the sea stacks and wildlife are there in any season, but rough seas during the monsoon mean smaller, bumpier boatloads and occasionally cancelled night walks. Check conditions with Sarawak Forestry on the morning you travel rather than assuming the crossing will run as normal.
Gunung RayaLangkawi, KedahRequiredDecember to March, Langkawi’s driest and calmest monthsSeptember and October, the peak of the southwest monsoon and the wettest months of the year
The stair trail is still walked in the wetter months but becomes slippery and considerably slower; the summit road stays open in most weather, which is why many visitors treat it as a scenic drive rather than a hike outside the December to March window.
Pine Tree Trail, Fraser’s HillFraser's Hill (Bukit Fraser), Raub District, PahangRequiredMarch to September, the drier stretch for this part of the Titiwangsa RangeNovember to January, when the highland rains are heaviest and the trail turns to thick mud
The elevation here means cool, often misty conditions in any month, so the seasonal difference is mainly underfoot: firm and dusty in the dry months, consistently slick with roots and mud once the northeast monsoon sets in.
Bukit KutuKuala Kubu Bharu, Hulu Selangor, SelangorRequiredFebruary to August, the same drier window as the rest of Selangor’s Main Range trailsNovember to January, when the climb to the ridge turns to mud and cloud closes in early
Bukit Kutu shares Selangor’s wetter November to January stretch with Gunung Nuang and Bukit Tabur. The old hill station ruins near the summit sit exposed on the ridge, so afternoon cloud and wind arrive quickly whatever the season, and the descent past Cobra Rock is harder to judge in failing light.
Gunung DatukRembau, Negeri SembilanNot requiredFebruary to August, matching the rest of Negeri Sembilan’s hiking calendarNovember to January, when the granite sections near the summit get slick
The final stretch to the summit crosses bare granite held with fixed ropes, which turns genuinely slippery in rain regardless of the month. Negeri Sembilan sees rain year round, so a dry morning is worth more than a dry season here.
Templer ParkRawang, Gombak District, SelangorNot requiredFebruary to August, the same window as the rest of the Selangor lowlandsNovember to January, when the waterfall pools run high and fast
The park sees rain year round with a wetter stretch from November to January. The waterfall and swimming pools are the first thing closed when the river rises, so a dry recent forecast matters more than the calendar month.
FRIM KepongKepong, SelangorNot requiredYear round for the ground trails, since they sit in mature, well-covered lowland forestNo sharp seasonal window, though the canopy walkway alone closes for lightning risk more often from November to January, when afternoon storms are most frequent
FRIM’s ground trails are walkable in almost any weather since they sit in mature lowland forest with good cover. The canopy walkway is the exception: it closes for lightning risk at the first sign of a thunderstorm, which is common on afternoons from November to January.
Gunung RajahBentong, PahangRequiredFebruary to August, the same drier window as the rest of the Main RangeNovember to January, when the river crossings near Chamang Waterfall run highest
Gunung Rajah shares its trailhead with Chamang Waterfall, so the same river that makes a pleasant pool in the dry months can rise fast and block the early crossings after rain. This is one of the longest and steepest day routes on the whole site; most groups either start in the dark or split it over two days with a camp partway up.
KL Forest Eco Park (Bukit Nanas)Bukit Nanas, Kuala LumpurRequiredYear-round: the reserve is entirely shaded, but the park is closed every Friday whatever the season, and it can close without notice in heavy weatherNo sharp seasonal window; the operational closures matter more here than the weather, since the park does not open at all on Fridays and the canopy walkway has its own separate maintenance schedule
The 200 metre canopy walkway is the park’s signature feature, but 2026 visitor reports describe it closed for maintenance more than once, while some general guides still list it as open; call the park office before a visit built specifically around the walkway. The ground-level rainforest loop trails are unaffected by that and are the more dependable reason to come.
Bukit KiaraTaman Tun Dr Ismail, Kuala LumpurNot requiredYear-round, with genuinely no bad months for the paved lake loop; the upper Rock Garden and ridge trails are the part to treat carefully after heavy rainNo sharp seasonal window for the lower lake loop; the upper Rock Garden and ridge sections are the ones to treat with more care after heavy rain, and the recent uneven reopening matters more here than any month of the year
The federal park was closed entirely for a drainage and stream upgrade from around mid-2024, missed an earlier promised reopening date, and finally reopened around June 2026, with some residents reporting the upgrade fell short of what was promised. As of this research pass, the connector trail between Bukit Sri Bintang and the main Bukit Kiara ridge, and a section near Rock Garden affected by landslide damage, had both been reported closed earlier in 2026 and may still be. Treat the TTDI Park lake loop and main marked trails as the reliable core of a visit, and check current status for the Bukit Sri Bintang connector specifically before relying on it.
Taman TuguTaman Tugu, Kuala LumpurNot requiredYear-round: the trails run almost entirely under forest canopy, which is a genuine advantage over more exposed Kuala Lumpur hikes in the heat of the dayNo sharp seasonal window; near-total canopy shade keeps the trails walkable through the wetter months too, though any dirt trail turns slippery after a heavy downpour
Opened in phases from 2020 as a forest restoration project rather than a repurposed park, Taman Tugu had no reported closures at the time of this research, unlike two of the other Kuala Lumpur sites on this site. That can change, so a quick check of the official site before a visit is still sensible.

Singapore

999 · 995Not required

Emergency numbers

Permits and the law

None of the 10 areas listed here need a permit. Access is open and free.

Guides

No guide is needed. Every route listed here is a public park trail managed by NParks, open without booking, so anyone charging you for access is not charging you for a permit.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Central Catchment Nature ReserveCentral SingaporeNot requiredFebruary and August, Singapore's driest monthsNovember to January, the wettest and stormiest period
Singapore is equatorial, so expect rain in any month; afternoon thunderstorms are common year round and the TreeTop Walk closes during lightning.
Bukit Timah Nature ReserveCentral SingaporeNot requiredFebruary and AugustNovember to January
As Singapore's oldest forest reserve, trails can close temporarily after storm damage; check the current trail status page before visiting.
Southern RidgesSouthern SingaporeNot requiredYear round; early morning or late afternoon avoids the midday heatNo closed season, though afternoon thunderstorms are more frequent November to January
The route is fully paved and elevated in sections, so it stays walkable even after heavy rain.
Pulau Ubin & Chek Jawa WetlandsEastern Singapore (offshore island)Not requiredYear round; check tide tables for the best Chek Jawa exposureNone fixed, though high tide covers most of the intertidal flat
Chek Jawa's wildlife is most visible at low tide; check the tide calendar before your trip.
Sungei Buloh Wetland ReserveNorth West Singapore, near KranjiNot requiredSeptember to March, when migratory shorebirds pass through on the East Asian-Australasian FlywayApril to August is not a closed season, only the weakest one for shorebirds: most have left for their northern breeding grounds and will not be back until September
There is no closed season: the reserve is open year round and wildlife is present in every month. Shorebird numbers simply peak during the northern winter migration, so a September to March visit gives the best chance of a big count.
Rail CorridorNorthern Singapore to Central Singapore, from Kranji south towards Bukit TimahNot requiredFebruary and August, Singapore's driest monthsNovember to January, the wettest and stormiest period
Most of the corridor has no tree cover, unlike a forest trail, so it runs hot in the midday sun regardless of season. Ballast and gravel sections drain quickly, but low-lying stretches can puddle for a day or two after the heaviest rain.
Labrador Nature ReserveSouthern SingaporeNot requiredFebruary and August, Singapore's driest monthsNovember to January, the wettest and stormiest period
The exposed rocky shore is the one place on this list where tide matters more than season: a falling tide exposes more of the natural shoreline, while the paved and boardwalk sections are walkable at any tide or time of year.
Dairy Farm Nature ParkUpper Bukit Timah, Central SingaporeNot requiredFebruary and August, Singapore's driest monthsNovember to January, the wettest and stormiest period
The Wallace Trail itself is mostly paved or well-drained gravel, so it stays walkable through the wetter months better than a dirt forest trail would. The main reason to prefer a dry morning is the Singapore Quarry viewing deck, which is far more rewarding under clear light than in flat, rainy grey.
Coney Island ParkPunggol, North East Singapore (offshore island)Not requiredFebruary and August, Singapore's driest monthsNovember to January, the wettest and stormiest period
There is almost no shade along the coastal sections of the loop, so the practical reason to time a visit is the sun rather than the rain: an overcast dry-season morning is more comfortable than a clear one in the middle of the day. Storms in November to January also make the exposed sea walls unpleasant and occasionally close beach access.
Pasir Ris Mangrove BoardwalkPasir Ris, Eastern SingaporeNot requiredFebruary and August, Singapore's driest monthsNovember to January, the wettest and stormiest period
The boardwalk itself is elevated above the mud, so it stays open and dry underfoot in any weather. The main seasonal consideration is the timber surface, which turns slippery within minutes of rain, and the birdwatching tower, which is far more useful on a clear morning than in low, rainy light.

Thailand

191 · 16695/11

Emergency numbers

Permits and the law

5 of the 11 areas listed here need a permit or a paid ticket. The rest are open access.

Issuing authorities

Guides

Most day routes need no guide, but the DNP requires a park-arranged guide on some overnight and restricted routes. Park entry fees are collected at the gate and differ for Thai and non-Thai visitors.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Doi Inthanon National ParkChiang MaiNot requiredNovember to February, the cool seasonMarch to May, the hot season, and June to October, the rainy season
Doi Inthanon is Thailand's highest point and can drop close to freezing overnight in December and January, with occasional frost near the summit.
Khao Yai National ParkNakhon RatchasimaRequiredNovember to FebruaryJune to October, the wettest months
Khao Yai is a UNESCO World Heritage forest complex with big mammal sightings (elephants, gibbons) most reliable in the cooler, drier months.
Khao Sok National ParkSurat ThaniRequiredDecember to April, the dry seasonSeptember to October, the wettest months
Khao Sok is ancient rainforest, among the wettest parts of Thailand, so expect rain even in the better months and higher river levels after storms.
Doi Suthep-Pui National ParkChiang MaiNot requiredNovember to FebruaryMarch to April, burning season haze, and June to October rains
Chiang Mai's dry season brings clear views from the ridge; March and April can bring agricultural burning haze that reduces visibility and air quality.
Erawan National ParkKanchanaburiNot requiredNovember to FebruaryMarch to May, when some upper pools can run low
The waterfalls are fullest just after the rainy season, from around October to December; expect the trail to be busiest on weekends and Thai public holidays.
Phu KraduengPhu Kradueng National Park, Loei ProvinceRequiredNovember to February, when the plateau is coolest and driest, sometimes near freezing at dawnJune to September, when the park is closed outright rather than merely wetter
The closure is a fixed annual rule for forest recovery, not a weather-dependent recommendation, so there is no way to hike Phu Kradueng in this window regardless of conditions. March to May is hot and increasingly humid ahead of the closure, making the November to February window the realistic target for most visitors.
Doi Chiang DaoChiang Dao Wildlife Sanctuary, Chiang Mai ProvinceRequiredNovember to February, the season the sanctuary actually opens the trail forJune to September, when the trail is closed to protect the sanctuary during the wet season and, later in the year, smoke haze can also affect access
Opening and closing dates shift slightly year to year depending on the end of the rains or the early arrival of dry-season smoke haze, which is itself a separate seasonal hazard in northern Thailand and can affect visibility and air quality even within the open window. Treat any date here as indicative and confirm against the sanctuary's own announcement for the year you plan to go.
Khao Phanom BenchaKhao Phanom Bencha National Park, Krabi ProvinceRequiredDecember to March, the driest window on this part of the Andaman coastSeptember to November, the peak of the southwest monsoon, when the summit trail is at its most treacherous
The waterfall trails stay pleasant most of the year since the forest keeps them shaded and the water flow is part of the appeal even in wetter months. The summit trail is the one that changes character with the rain: steep, sometimes unmarked ground turns genuinely hazardous when saturated, which is the main reason to time that specific hike for the dry season.
Khao Sam Roi Yot National ParkLaem Sala Beach, Khao Sam Roi Yot National Park, Prachuap Khiri KhanNot requiredNovember to February, the cool, dry season with the clearest skies for the cave’s light shaftJune to September, the wettest months, when the boat crossing can be cancelled in rough seas
The famous light shaft inside Phraya Nakhon Cave depends on the sun angle as much as the calendar: it appears for roughly an hour around mid-morning to noon, so an overcast morning ruins the effect even in the best months. Check the marine forecast before booking a boat in the rainy season, since crossings are cancelled rather than run rough.
Tarutao National Marine ParkKo Tarutao, Tarutao National Marine Park, SatunNot requiredDecember to April, calm seas and reliable ferry crossingsJune to September, the monsoon, when most of the park beyond the main island closes and seas turn rough
The main island stays open year round, but treating it as a monsoon-season destination misses most of what makes the wider marine park worth the trip: outer islands, better snorkelling and calmer boat travel all belong to the December to April window. Confirm ferry schedules directly before travelling in the shoulder months either side of the monsoon, since services thin out as conditions change.
Doi Pha Hom PokFang, Chiang MaiNot requiredNovember to February, cool and clear with the best mountain viewsMarch to May, northern Thailand’s agricultural burning season, when smoke haze can blot out the views entirely
The March to May haze is a genuine air-quality event across northern Thailand, not a minor inconvenience: visibility and air quality both drop sharply as farmers burn fields ahead of the planting season, and even a clear-looking morning can carry unhealthy particulate levels. Check air-quality readings for Chiang Mai and Fang before committing to this trip in those months.

Indonesia

1126/6

Emergency numbers

  • All services112

Guides

A guide is effectively compulsory on the volcano routes here. Rinjani requires a registered operator, and Batur is controlled by a single guide association, so a price quoted without a named operator is a warning sign.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Mount Rinjani National ParkLombokRequiredApril to December, the official trekking seasonJanuary to March, when the park closes annually for the monsoon and ecosystem recovery
Rinjani is an active volcano inside a national park where access rules change with conditions; trail status, closures and safe zones are announced on the TNGR website and should always be checked before booking.
Mount Bromo & the Sea of SandEast JavaRequiredMay to October, the dry season with the clearest sunrise viewsDecember to March, when mist and rain often hide the sunrise
Bromo remains an active volcano with a monitored alert level; the crater rim can close on short notice if activity increases, so check the current status on the official portal before travelling. The neighbouring Semeru summit trail, inside the same national park, is separately and periodically closed for safety or environmental reasons and does not affect access to Bromo or the Sea of Sand.
Kawah Ijen (Ijen Crater)East JavaRequiredApril to October, the dry season, for the clearest pre-dawn viewsNovember to March, when the crater trail turns slippery and sulfuric gas pools more heavily on the crater floor
Ijen hosts one of the world's largest highly acidic crater lakes alongside the blue fire phenomenon, both best seen in the dry season when trail footing and air quality are more predictable.
Mount BaturBaliRequiredApril to September, the dry season, for the most reliable sunrise conditionsDecember to February, the wettest months, when cloud often hides the sunrise
Batur is an active volcano within a UNESCO Global Geopark; trails are short enough to climb year-round, but the pre-dawn path can be muddy and slippery after rain, so sturdy footwear matters even on a moderate hike.
KelimutuKelimutu National Park, Ende Regency, Flores, East Nusa TenggaraRequiredApril to September, the dry season, when cloud is least likely to hide the crater and the sunrise viewDecember to February, the wet season, when the summit is frequently clouded over at dawn
The walk itself is unaffected by weather, but the entire reason to make the pre-dawn trip is the view, so a clouded-over dry-season morning is still a better bet than a clear wet-season one. The lake colours themselves shift throughout the year regardless of season, driven by the volcano’s own chemistry rather than rainfall.
Bantimurung-BulusaraungBantimurung-Bulusaraung National Park, Maros Regency, South SulawesiRequiredMay to September, the dry season, when the karst river trip is calmest and the waterfall flow is manageable rather than overwhelmingDecember to February, when heavy rain raises the karst rivers and can make the boat trip to Rammang-Rammang unsafe or unavailable
The waterfall and cave areas stay open through the wet season, since they are less exposed, but the Rammang-Rammang river trip is the part most sensitive to rain: check conditions with a local boatman rather than assuming the trip will run as usual in the wetter months.

Vietnam

113 · 114 · 1153/6

Emergency numbers

Permits and the law

3 of the 6 areas listed here need a permit or a paid ticket. The rest are open access.

Issuing authorities

Guides

Park management boards register visitors at the gate and arrange guides for the longer routes. Fansipan can also be reached by cable car, so check whether a trip you are paying for is actually a trek.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Mount FansipanSapa, Lao CaiRequiredSeptember to November and February to AprilJune to August, the wettest and mistiest months, and December to January, when the summit can see frost or snow
Fansipan is Vietnam's and Indochina's highest point; weather turns fast above the tree line, and even in the dry season the summit can be well below freezing at night.
Cat Ba National ParkHai PhongNot requiredOctober to December and March to MayJune to September, the hot, humid and typhoon-prone season in the Gulf of Tonkin
Cat Ba National Park protects the largest tract of primary rainforest left on the limestone karst islands of the Ha Long-Cat Ba archipelago, home to the critically endangered Cat Ba langur.
Pu Luong Nature ReserveThanh HoaNot requiredMay to June and September to October, for the golden rice terracesJuly and August, the wettest and most humid months, when trails and river crossings can be difficult
Pu Luong's terraced valleys and Thai and Muong stilt-house villages are at their most photogenic around the two annual rice cycles; outside those windows the terraces are green or freshly ploughed rather than golden.
Ba Vi National ParkHanoiNot requiredOctober to April, the cooler, drier monthsJune to August, the hottest and wettest months around Hanoi
Ba Vi is often misty year-round, which suits its cool-climate pine forest character but can limit the summit view; clearer visibility is more likely in the cooler months.
Phong Nha-Ke BangPhong Nha-Ke Bang National Park, Bo Trach District, Quang BinhRequiredFebruary to August, before the autumn flood seasonSeptember to November, when central Vietnam’s flood season regularly closes river-access caves like Phong Nha Cave itself
Phong Nha Cave is entered by boat along an underground river, so it is the first thing affected when water levels rise; Paradise Cave and Tien Son Cave sit higher and stay open more reliably through the shoulder months. Check current conditions locally rather than assuming every cave follows the same calendar.
Lang BiangLang Biang, Bidoup Nui Ba National Park, Lac Duong District, Lam DongRequiredDecember to March, the dry season in the southern central highlands, with cool, clear morningsJuly to September, the peak of the wet season, when the summit trail is at its muddiest and cloud most often hides the view
Da Lat's highland climate keeps this cooler than most of Vietnam year round, so rain rather than heat is the main seasonal variable. The jeep-accessible lower viewpoint stays a reasonable option even in wetter months; it is the unpaved summit trail beyond it that suffers most.

Philippines

9114/6

Emergency numbers

  • All services911

Guides

DENR-run protected areas and local tourism offices normally require a registered local guide and a logged registration. That registration is the thing to ask for: a legitimate organiser can name the office that issued it.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Mount Pulag National ParkBenguet / Ifugao, LuzonRequiredNovember to February, for the reliable pre-dawn sea of cloudsJune to October, the southwest monsoon and typhoon season
Pulag is Luzon's highest peak and the sea-of-clouds phenomenon at sunrise is weather-dependent even in the dry season; nights on the summit grasslands regularly approach freezing.
Mount PinatuboTarlac / ZambalesRequiredNovember to May, the dry seasonJune to October, the rainy season, when the river-bed trail is prone to flash flooding
Pinatubo's 1991 eruption reshaped the region, and the trek follows a lahar-carved river valley to the caldera lake formed in the aftermath; the trail crosses Aeta ancestral domain, so guides are drawn from and organised with the local Aeta community.
Mount Apo Natural ParkDavao / North Cotabato, MindanaoRequiredSeptember to May, outside the annual closure and wettest monthsJune to August, when the entire park is closed to trekking and camping under the PAMB annual closure
Mount Apo is the highest peak in the Philippines and a dormant volcano sacred to the Lumad peoples of Mindanao, including the Bagobo and Manobo; the PAMB enforces the June-to-August closure to let vegetation and wildlife recover during the wettest months.
Mount BatulaoNasugbu, BatangasNot requiredNovember to April, the dry seasonJune to October, the rainy season, when the grassy slopes turn slippery
Batulao is one of the most-hiked mountains near Manila thanks to its short drive and dramatic jagged ridgeline, so weekends and holidays draw large crowds; a weekday or early-morning start is far quieter.
Osmeña PeakMantalungon, Dalaguete, Cebu, VisayasRequiredDecember to April, the dry season across the VisayasJuly to October, when the southwest monsoon and typhoon season bring the heaviest rain and the least reliable views
The peak is walkable year round, since the trail is short and not weather-dependent in the way a long trek would be, but the entire appeal is the 360-degree view, so a typhoon-season trip risks paying for a guide and a climb with nothing to see at the top.
Mount TapyasCoron, Busuanga Island, Palawan, MIMAROPANot requiredDecember to April, the driest and calmest months in this part of PalawanJuly to September, the peak of the southwest monsoon and typhoon season
The concrete steps stay climbable in almost any weather short of an active storm, so this is more forgiving of a spontaneous plan than most entries on this site; the main seasonal factor is simply how likely a clear sunset view is on a given evening.

Brunei

993 · 991 · 9952/6

Emergency numbers

Permits and the law

2 of the 6 areas listed here need a permit or a paid ticket. The rest are open access.

Issuing authorities

Guides

Ulu Temburong can only be reached through an approved operator, since access is by longboat and the park controls numbers. The other reserves listed here are open walk-in recreation areas.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Ulu Temburong National ParkTemburong DistrictRequiredFebruary to August, when river levels are more predictableNovember to January, the wettest months of the northeast monsoon, when high river levels can suspend longboat transfers
Brunei's equatorial rainforest sees rain year-round, so this is a matter of degree rather than a dry season versus a wet one; operators reschedule or adjust the river route when levels run high, so build a little flexibility into the trip.
Bukit Patoi, Peradayan Forest ReserveTemburong DistrictNot requiredFebruary to August, with the clearest views from the summitNovember to January, the wettest months, when the boulder sections near the summit turn especially slippery
The rock sections near the summit are slippery whenever wet, so it is worth checking recent weather rather than fixating on a single best season in this equatorial climate.
Bukit Shahbandar Forest Recreation ParkBrunei-Muara DistrictNot requiredYear-round, ideally in the early morning before the midday heat and humidity buildNo sharp seasonal window, though the northeast monsoon months of November to January bring the heaviest rain and muddier trails
Shahbandar is a popular local exercise spot as much as a visitor trail, so weekday mornings are quieter than weekend afternoons.
Tasek Merimbun Heritage ParkMukim Rambai, Tutong DistrictNot requiredFebruary to August, the same drier stretch as the rest of BruneiNovember to January, the northeast monsoon period, when the lake and swamp forest are at their fullest and the boardwalks can flood
Merimbun is a lake and swamp forest, so its boardwalks are more flood-prone than a hillside trail: heavy monsoon rain can put sections of the Merimbun Botanical Trail under water rather than just making it muddy.
Bukit TerajaKampong Teraja, Labi, Belait DistrictRequiredFebruary to August, the drier half of the yearNovember to January, the northeast monsoon, when the stream crossings on the way to the waterfall run high
The trail crosses several streams on the way to the waterfall pool, which is the main reason the wetter months matter more here than on a straightforward hill walk: a crossing that is ankle-deep in the dry months can be waist-deep after sustained monsoon rain.
Luagan Lalak Forest Recreation ParkKampong Sungai Petai, Belait DistrictNot requiredYear round, since the boardwalks sit above the water rather than on a dirt trail that turns muddyNo sharp seasonal window, though the northeast monsoon of November to January raises the swamp water level and can put the lowest boardwalk sections closer to it
Unlike a hill trail, the main seasonal variable here is how much of the swamp is visible above the waterline rather than how muddy the ground is, since visitors never actually touch the ground.

Japan

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Emergency numbers

Permits and the law

1 of the 11 areas listed here need a permit or a paid ticket. The rest are open access.

Issuing authorities

Guides

Guides are not required, but Mount Fuji has an official climbing season, a per-person fee and entry gates that close overnight. Outside that season the huts and rescue cover close and the climb becomes a winter mountaineering undertaking.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Mount FujiYamanashi / ShizuokaRequiredEarly July to early September, the official climbing seasonOutside the official season, when huts, toilets and rescue services close and the mountain carries snow and ice, making an ascent a serious winter-mountaineering undertaking
Fuji is climbable only within the short official season; outside it, the mountain is a genuine alpine environment reserved for experienced winter mountaineers, not a casual hike regardless of how the summit looks from a distance.
Kumano Kodo (Nakahechi Route)Wakayama, Kii PeninsulaNot requiredMarch to May and October to NovemberLate July to September, hot, humid and prone to typhoons on the Kii Peninsula
A UNESCO World Heritage pilgrimage route walked continuously for over a thousand years, Kumano Kodo passes through working forestry villages rather than wilderness, so lodging is in family-run inns rather than tents, and stone-paved sections can be slippery when wet.
Mount TakaoTokyoNot requiredYear-round, with mid-November to early December drawing the largest crowds for autumn foliageNo closed season, though midsummer humidity makes the climb noticeably more strenuous
One of the most-climbed mountains in the world thanks to its easy access from central Tokyo, Takao holds three Michelin stars for its views and old-growth forest, and gets genuinely crowded on autumn weekends.
Yakushima (Jomon Sugi Trail)KagoshimaNot requiredMay and October to November, for a relatively drier and cooler window on one of Japan's wettest islandsJune, the plum-rain season, and August to September, when typhoons regularly cross the island
Yakushima is famously said to rain 35 days a month; the Jomon Sugi trail can run at any time of year, but heavy rain raises the risk of slippery boardwalk sections and swollen streams, so checking the forecast the night before matters more than the calendar month.
KamikochiKamikochi, Chubu-Sangaku National Park, Matsumoto City, Nagano, Northern Japan AlpsNot requiredLate April to June for fresh green and fewer crowds, and September to mid-October for autumn colour, avoiding the height of summer crowds and the July-August rainy patchesMid-November to mid-April, when Kamikochi closes entirely and both the bus service and every facility in the valley shut down for winter
Kamikochi is not merely quieter in winter, it is completely closed: no bus service runs and no facilities operate between roughly 15 November and 17 April each year, so there is no way to visit the valley floor itself in that window, let alone attempt the higher peaks.
Asahidake, DaisetsuzanAsahidake, Daisetsuzan National Park, Higashikawa, HokkaidoNot requiredJuly to September, Hokkaido's short true summer hiking seasonOctober to June, when snow typically closes the higher trails and Daisetsuzan often sees Japan’s first snowfall of the year as early as late September
Daisetsuzan earns its nickname as Japan's first mountains to see snow: the hiking window here is genuinely shorter than almost anywhere else on this site, and conditions can turn wintry with little warning even within the official season. Check the ropeway and trail status on the day rather than relying on the calendar alone.
Mount RishiriRishiri Island, Rishiri-Rebun-Sarobetsu National Park, HokkaidoNot requiredJune to early October, the only window the trail is reliably snow-freeOctober to May, when snow and ice make the upper ridge genuinely dangerous
Rishiri sits far enough north and close enough to the sea that weather changes fast: a clear morning at the trailhead is no guarantee of a clear summit ridge four hours later. Staff at the campsite hut post daily conditions; treat a turn-back advisory as final rather than pushing on.
Mount HakkodaHakkoda Mountains, Towada-Hachimantai National Park, Aomori, TohokuNot requiredLate May to June for fresh green and lingering snow patches, September to October for autumn colourNovember to March, when Hakkoda becomes one of Japan’s most extreme winter mountaineering and backcountry ski destinations rather than a hiking one
Hakkoda is famous for its winter juhyo, wind-sculpted "snow monsters" formed on frozen fir trees, but that is a viewing season for the ropeway, not a hiking one: winter access to the ridge trails is for experienced mountaineers with full winter gear only. The marked hiking season runs roughly late April to early November, weather permitting.
Mount Aso: KusasenriKusasenri, Mount Aso, Aso-Kuju National Park, Kumamoto, KyushuNot requiredSeptember to November, clear skies and grazing horses on the grasslandJune and July, the peak of the rainy season
Kusasenri is walkable year round in mild weather, and horse riding on the grassland runs from early March to mid December. The bigger variable here is not the season but Nakadake’s access status, which can change with volcanic activity regardless of month, so a same-day check matters more than a seasonal one.
Nakasendo: Magome to TsumagoMagome-Tsumago, Kiso Valley, Nagano and Gifu, Central JapanNot requiredApril to May and October to November, mild temperatures and spring or autumn colour along the routeJuly and August, when high heat and humidity make the exposed sections of paved road uncomfortable
The route is walkable year round and stays open through light winter snow, though a few icy mornings a year make the stone paving slick. Spring and autumn simply give the most comfortable walking weather and the best photographs of the post towns.
Mount Tateyama (Murodo Route)Murodo, Mount Tateyama, Chubu-Sangaku National Park, Toyama, Northern Japan AlpsNot requiredLate June to early October, when the Murodo trails are clear of snowLate November to mid April, when the Alpine Route itself closes for winter
The Alpine Route opens mid to late April and closes around 30 November each year, but the famous snow corridor walk near the opening date is a separate attraction from the Oyama hike: snow lingers on the Murodo plateau itself well into June, so the actual hiking trail to the summit is only reliably clear from late June.

South Korea

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Emergency numbers

Permits and the law

3 of the 4 areas listed here need a permit or a paid ticket. The rest are open access.

Issuing authorities

Guides

No guide is needed, but the Korea National Park Service runs a reservation system on the busiest peaks and closes trails outright for fire risk and for winter conditions. Check the trail status page on the morning you leave.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Seoraksan National ParkGangwonRequiredSeptember to October for autumn foliage, and April to May for spring blossomDecember to February, when the upper trail is snow and ice covered and demands crampons and winter mountaineering experience
Seoraksan's granite peaks and maple forests make it one of Korea's most photographed autumn destinations, so the foliage weeks bring both the best colour and the biggest crowds and tightest shelter competition.
Jirisan National ParkJeolla / GyeongsangRequiredApril to May for spring azaleas, and September to October for autumn colourLate July to August, the monsoon season, when the exposed ridge is prone to lightning and heavy rain
Jirisan is the largest national park on the Korean mainland and the source of the country's longest ridge trek; the full traverse is a serious multi-day undertaking best planned around settled weather rather than a fixed calendar date.
Bukhansan National ParkSeoulNot requiredApril to May and October to November, for mild temperatures and clearer viewsLate December to February, when the rocky chain sections near the summit ice over and become genuinely hazardous without proper winter traction gear
Bukhansan is listed in the Guinness Book of World Records as the world's most-visited national park per unit area, so this is never a solitary hike; weekday mornings offer the closest thing to a quiet trail.
Hallasan National ParkJejuRequiredApril to May for the Jindallaebat azalea bloom, and October to November for autumn colourDecember to February without proper winter gear, when the upper mountain holds heavy snow and ice
As South Korea's highest peak and a dormant volcano, Hallasan's crater lake Baengnokdam is reachable only via the reservation system on the two summit trails; check the official website for the current status of both routes before travelling, since maintenance closures like the 2026 Gwaneumsa works can shift with little notice.

Taiwan

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Emergency numbers

Permits and the law

2 of the 4 areas listed here need a permit or a paid ticket. The rest are open access.

Issuing authorities

Guides

High-mountain routes need two separate approvals, a national park permit and a police mountain entry permit, both applied for through one government portal. Quotas are small and demand exceeds them, so an organiser promising guaranteed places should be questioned.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Yushan (Jade Mountain)Nantou / ChiayiRequiredOctober to December and March to May, the clearest and driest windowsJune to September, typhoon season, and January to February without full winter mountaineering gear and experience
As Taiwan's and Northeast Asia's highest peak, Yushan can carry snow and ice on the upper switchbacks in winter, and the exposed final scramble to the summit is unforgiving in poor visibility or high wind at any time of year.
Xueshan (Snow Mountain)Miaoli / TaichungRequiredOctober to December and March to MayJune to September, typhoon season, and midwinter without crampons and ice-axe experience, given the mountain's name
Xueshan, meaning Snow Mountain, genuinely holds snow in cold winters, making it one of the few places in subtropical Taiwan where winter mountaineering skills matter; outside winter it is a demanding but non-technical high alpine trek.
Hehuanshan East PeakNantouNot requiredOctober to December and March to May for clear sunrise and sea-of-clouds viewsNo fixed closed season, though the road can close temporarily during typhoons in summer or heavy snow in January and February
Hehuanshan is one of the very few places in Taiwan where a peak above 3,400 metres is reachable by road, making East Peak a favourite for sunrise, star-gazing and, in a cold winter, some of the island's most accessible snow; the separate Main Peak Trail has been under repair, so check current trail status before travelling.
Alishan National Forest Recreation AreaChiayiNot requiredNovember to April, for the most reliable sea-of-clouds and sunrise conditionsJuly to September, typhoon season, when heavy rain can disrupt both road and forest railway access
Alishan is as much a cultural and scenic institution as a hiking destination, famous for its narrow-gauge forest railway, red cypress groves and cherry blossoms in March, so trail conditions are secondary to weather affecting the wider journey up the mountain.

Hong Kong

999Not required

Emergency numbers

  • All services999

Permits and the law

None of the 4 areas listed here need a permit. Access is open and free.

Guides

No permits and no guides. The country parks are free and open, and the trails carry numbered distance posts that rescue services use to locate you, so note the nearest post if you need help.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
MacLehose Trail (Sections 1-2)Sai Kung, New TerritoriesNot requiredOctober to April, the cooler, drier monthsJune to September, the hot, humid and typhoon-prone months
This opening stretch of the 100-kilometre MacLehose Trail is widely considered its most scenic, combining an easy reservoir-side walk with a genuinely rewarding ridge climb and some of Hong Kong's clearest turquoise water at Long Ke and Sai Wan.
Dragon's BackShek O Country Park, Hong Kong IslandNot requiredOctober to April, for cooler temperatures and clearer coastal viewsThe hottest, most humid stretch of June to September, when the largely shadeless ridge can feel punishing at midday
Dragon's Back has long been celebrated as one of Asia's best urban hikes, precisely because the walk from forested ridge to a surf beach takes barely half a day and needs no car; that accessibility also makes weekends genuinely crowded.
Lion RockLion Rock Country Park, KowloonNot requiredOctober to April, for the clearest views over the cityHazy summer afternoons, when humidity and pollution often blur the skyline view
Lion Rock's crouching-lion silhouette is a genuine Hong Kong icon, giving its name to the 'Lion Rock Spirit' associated with the city's resilience; the summit rewards a short, steep climb with one of the most complete panoramas over both Kowloon and Hong Kong Island.
Tai Mo ShanTai Mo Shan Country Park, New TerritoriesNot requiredOctober to February, for the clearest skies and the chance of the cool misty conditions the mountain is known forSummer haze and typhoon-season days, when visibility from the summit road can drop to almost nothing
Tai Mo Shan means 'Big Hazy Mountain', a fitting name since its summit is capped by cloud and mist more often than not; on rare cold snaps it is one of the very few places in Hong Kong that sees frost.

Mainland China

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Emergency numbers

Guides

Guides are not required, but every scenic area here sells real-name tickets tied to a passport or ID and caps daily numbers. Buy through the official platform: a ticket resold without your name on it may not admit you.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Huangshan (Yellow Mountain)AnhuiRequiredApril to June and September to November, plus clear winter days from December to February for snow-dusted pinesJuly and August, when heat, humidity and afternoon thunderstorms are most likely to block the views
The sea of clouds is most reliable in the hour after rain clears, and the mountain's famous pines and stairways look just as striking dusted with a light winter snow, though icy steps then call for extra caution and grippers.
Zhangjiajie (Wulingyuan)HunanRequiredApril to June and September to NovemberJuly and August for heat and crowds, and the Chinese New Year and 1-7 October national holiday weeks, when every viewpoint and cable car queue is at its busiest
Mist is common through the sandstone pillars and often clears by mid-morning, so an early start gives the best chance of the floating-peak scenery the park is famous for.
Mount Emei (Emeishan)SichuanRequiredSeptember to November and December to February for the best odds of the sea of clouds and a clear sunrise from the Golden SummitJune to August, the wettest and foggiest months, when the lower forest trail is humid and leeches are common after rain
Emeishan is famous for its 'four spectacles': the sea of clouds, sunrise, Buddha's rays and saint lamps, all best seen from the Golden Summit in clear winter weather; icy stone steps near the top in winter call for crampons or grippers.
Yubeng Village (Meili Snow Mountain)YunnanRequiredOctober to May, especially mid-October to mid-November for clear views of Kawagarbo and autumn colour on the lower slopesJune to September, the summer monsoon, when rain raises the risk of landslides on the access road and trail
Kawagarbo, the 6,740-metre peak that watches over the village, is sacred to Tibetan Buddhists and has never been climbed, its ascent formally prohibited since 2001; cloud cover can hide the summit for days even in good months, so building in a spare day improves the odds of a clear view.

North Korea

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Permits and the law

All 1 areas listed here need a permit or a paid ticket before you walk.

Issuing authorities

Guides

Independent travel does not exist here: every visitor is assigned a state guide who is present at all times, and there is no separate permit, booking or emergency-calling system outside that arrangement. As of this update, North Korea remains closed to almost all foreign tourism (Russian nationals are the current exception), and several governments, including the United States, either advise against all travel there or restrict their own citizens’ passports from being used for it. Everything on this page describes what has been offered when the country has been open, for planning ahead of a reopening, not a trip you can book today.

Season and weather, area by area

AreaRegion or cityPermitBest monthsAvoid
Mount MyohyangHyangsan County, North Pyongan Province, on the border with South Pyongan ProvinceRequiredApril to May and September to October, the same spring and autumn windows that suit hiking across the rest of the Korean peninsulaDecember to February, when the mountains are deep in continental winter cold and snow
North Pyongan Province shares the Korean peninsula's continental monsoon climate: hot, humid summers with heavy July and August rain, and cold, dry winters. None of this changes the fact that a visit here is only possible as part of a licensed tour, on whatever dates that operator is running and the country is accepting tourists.

Official booking channels

Skip the middleman where you can. These are the government departments and park corporations that actually issue every permit on this site. Book or verify directly with them.

If something looks wrong

If a trip organiser cannot produce a valid permit number or refuses to say which authority issued it, do not pay. You can verify a park permit directly with the issuing office using the contact details on that park’s page on this site.

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