155+ Parks Covering 12% of the Country

🌳 National Parks in Thailand: Complete Guide 2026

Thailand is home to over 155 national parks spanning mountains, jungles, limestone karst landscapes, and tropical marine reserves. From the misty peaks of Doi Inthanon (2,565 m) to the crystal-clear waters of the Similan Islands, these parks protect some of Southeast Asia's most extraordinary biodiversity — including wild elephants, gibbons, hornbills, and whale sharks.

Last updated: 2026-03-02

Overview: Thailand's National Park System

Thailand established its first national park, Khao Yai, in 1962. Today the Department of National Parks (DNP) manages 155+ national parks covering approximately 62,000 km² — about 12% of the country's total land area. The parks range from mountain forests in the north (Doi Inthanon, Doi Suthep-Pui) to vast marine parks in the south (Mu Ko Similan, Mu Ko Ang Thong). Thailand's national parks protect over 15,000 plant species and hundreds of mammal, bird, and reptile species. Several parks, including Khao Yai, are UNESCO World Heritage Sites. All parks are managed by the DNP under the Ministry of Natural Resources and Environment, with a standardized entry fee system for both Thai nationals and foreign visitors.

Top 10 National Parks in Thailand

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Khao Sok National Park

Surat Thani Province. One of the world's oldest evergreen rainforests (160 million years). Highlights: Cheow Lan Lake with floating raft houses, towering limestone karsts, and the world's largest flower (Rafflesia). Best time: December–April. Look for wild elephants, gibbons, hornbills, and the rare Malayan tapir.

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Erawan National Park

Kanchanaburi Province. Famous for the stunning 7-tier Erawan Waterfall with emerald pools perfect for swimming. The trail to all 7 tiers is about 2 km and takes 1.5–2 hours. Best time: November–April (upper tiers often closed in rainy season). Also home to Phartat Cave with impressive stalactites.

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Doi Inthanon National Park

Chiang Mai Province. Thailand's highest peak at 2,565 meters. Highlights: twin Royal Pagodas, Wachirathan and Sirithan waterfalls, Ang Ka Nature Trail through a cloud forest, and the Kew Mae Pan trail with panoramic views. Best time: November–February (cool season, occasional frost at the summit). Over 380 bird species recorded.

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Khao Yai National Park (UNESCO)

Nakhon Ratchasima Province (2.5 hrs from Bangkok). Thailand's oldest and most visited national park, UNESCO World Heritage since 2005 as part of the Dong Phayayen-Khao Yai Forest Complex. Highlights: wild elephant herds (best seen at salt licks), Haew Suwat Waterfall (from The Beach movie), and night safari tours. Best time: November–February. Over 3,000 plant species and 70+ mammal species.

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Mu Ko Similan National Park

Phang Nga Province (Andaman Sea). A group of 9 granite islands with some of the clearest water and best diving in Southeast Asia. Highlights: Sail Rock (Donald Duck Bay), coral reefs, manta ray encounters, and pristine white sand beaches. Open mid-October to mid-May only. Best diving: February–April. Visitor numbers are capped at 3,325 per day.

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Mu Ko Ang Thong National Marine Park

Surat Thani Province (Gulf of Thailand). An archipelago of 42 islands near Koh Samui, known for dramatic limestone cliffs, hidden lagoons (including the Emerald Lake / Thale Nai), kayaking, and snorkeling. Day trips from Koh Samui or Koh Phangan. Best time: February–October. The park closes November–late December during the monsoon.

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Kaeng Krachan National Park

Phetchaburi Province. Thailand's largest national park at 2,915 km², bordering Myanmar. A birding paradise with 400+ species including the great hornbill and the elusive broadbill. Highlights: Pa La-U Waterfall (16 tiers), misty mountain viewpoints, and wild elephant sightings. Best time: November–April. Some areas require 4WD or hiring a park vehicle.

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Sri Lanna National Park

Chiang Mai Province. A lesser-known gem surrounding the Mae Ngat Somboon Chon Reservoir. Highlights: floating raft houses on the reservoir, kayaking, mountain biking, and lush tropical forest with waterfalls. Best time: November–March. Much quieter than Doi Inthanon — perfect for escaping the crowds. Only 1.5 hours from Chiang Mai city.

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Doi Suthep-Pui National Park

Chiang Mai Province. The mountain park right on Chiang Mai's doorstep, home to Wat Phra That Doi Suthep — the city's most sacred temple. Highlights: the 309-step Naga staircase to the temple, Monthathan and Huay Kaew waterfalls, and the Hmong village of Doi Pui. Best time: November–February. Easy half-day trip from the city (16 km from the old town).

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Khao Sam Roi Yot National Park

Prachuap Khiri Khan Province. Thailand's first coastal national park, 'Mountain of 300 Peaks'. Highlights: Phraya Nakhon Cave with its iconic pavilion lit by sunlight, mangrove boardwalks, freshwater marshlands (important bird habitat), and quiet beaches. Best time: November–April. Only 3.5 hours south of Bangkok — great for a weekend trip.

Entry Fees for Thailand's Top National Parks (2026)

National Park	Foreigner Adult	Foreigner Child	Thai Adult	Vehicle Fee
Khao Yai	400 THB	200 THB	100 THB	50 THB (car)
Mu Ko Similan	500 THB	300 THB	100 THB	N/A (boat access)
Erawan	300 THB	200 THB	100 THB	30 THB (car)
Doi Inthanon	300 THB	150 THB	100 THB	30 THB (car)
Khao Sok	300 THB	150 THB	40 THB	30 THB (car)
Mu Ko Ang Thong	300 THB	150 THB	40 THB	N/A (boat access)
Kaeng Krachan	300 THB	150 THB	40 THB	30 THB (car)
Sri Lanna	200 THB	100 THB	40 THB	30 THB (car)
Doi Suthep-Pui	200 THB	100 THB	40 THB	30 THB (car)
Khao Sam Roi Yot	200 THB	100 THB	40 THB	30 THB (car)

Camping in Thai National Parks

Many of Thailand's national parks offer campgrounds with basic facilities. Camping is an affordable and immersive way to experience the parks — waking up to the sounds of gibbons and hornbills is something a day trip can't match. **Booking:** Reservations are made through the official DNP website at nps.dnp.go.th. For popular parks like Khao Yai, Erawan, and Khao Sok, book at least 2-4 weeks in advance — especially during weekends and Thai public holidays (Songkran, New Year). The site is available in Thai and English. **Tent rental:** If you don't have your own tent, the park rents them for 150-450 THB/night depending on size (2-person tents around 150-225 THB, larger 6-8 person tents up to 450 THB). Sleeping bags are available for 30-60 THB/night. Some parks also rent sleeping mats (20-40 THB). **Facilities:** Most campgrounds have shared bathrooms with showers (cold water), some have small camp shops selling instant noodles and water. Electricity is available at some campgrounds but not all — bring a power bank. Campfires are not allowed in national parks. **What to know:** Check-in is usually by 6 PM. Trash must be packed out. Food should be stored properly — monkeys and civets will raid unattended bags. Some parks (like Khao Sok raft houses) offer a more comfortable 'glamping' experience with mattresses and blankets included, from 500-1,500 THB/night.

⚠️ Seasonal Park Closures

Many Thai national parks close partially or fully during the monsoon season. **Mu Ko Similan** closes every year from mid-May to mid-October. **Mu Ko Ang Thong** typically closes November through late December. **Erawan National Park** keeps the lower tiers open year-round but closes the upper tiers (5-7) during heavy rain due to flash flood risk. Several mountain parks like Kaeng Krachan restrict access to certain trails and viewpoints during the wettest months (August–October). Always check the DNP website (dnp.go.th) or call the park directly before visiting. Trail closures can happen on short notice after heavy rainfall, even during the dry season.

Wildlife Spotting in Thailand's National Parks

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Wild Asian Elephants

Thailand is home to an estimated 3,000-4,000 wild elephants. Best spots: Khao Yai (herds seen regularly at salt licks, especially at dusk), Kaeng Krachan (along river banks), and Kui Buri National Park near Prachuap Khiri Khan. Keep at least 30 meters distance — these are wild animals, not the tamed elephants at tourist camps.

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Gibbons

White-handed gibbons and pileated gibbons are found in Khao Yai, Khao Sok, and Kaeng Krachan. You'll hear their haunting morning calls echoing through the canopy long before you see them. Best spotted early morning (6-8 AM) when they're most active in the treetops. Hire a local guide — they know the territorial routes.

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Hornbills

Thailand has 13 hornbill species, including the impressive great hornbill (wingspan up to 1.5 m) and the oriental pied hornbill. Best seen in Khao Yai, Kaeng Krachan, and Khao Sok. The great hornbill's wing beats are so loud you can hear them from hundreds of meters away. Fruiting fig trees are natural magnets for hornbills.

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Monitor Lizards

Water monitors (up to 2 meters long) are common in many parks and even in Bangkok's Lumphini Park. You'll spot them near rivers, reservoirs, and campgrounds. They look intimidating but are generally harmless to humans. In national parks, keep food stored securely — monitors are excellent scavengers and will investigate cooking areas.

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Langurs & Macaques

Dusky langurs (silver-leaf monkeys) are found in southern parks, while long-tailed macaques are everywhere. Langurs are shy and beautiful — look for them in Khao Sam Roi Yot and Ang Thong. Macaques are bold and will steal food, sunglasses, and water bottles. Never feed monkeys — it makes them aggressive and dependent on human food.

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Whale Sharks & Sea Turtles

The Similan Islands are one of Thailand's best spots for whale shark encounters (mainly February–April). These gentle giants can reach 12 meters. Green and hawksbill sea turtles nest on the beaches of the Similans and Surin Islands. Turtle nesting season is November–February. Snorkelers regularly spot reef sharks and sea turtles around Koh Similan and Koh Bon.

Best Time to Visit Each Park

National Park	Best Months	Avoid	Why
Khao Sok	Dec – Apr	Sep – Nov	Heavy rain floods trails; lake tours still possible year-round
Erawan	Nov – Apr	Jul – Oct	Upper tiers (5-7) close in rainy season due to flash flood risk
Doi Inthanon	Nov – Feb	Jul – Sep	Cool season = best views; summit can hit 0°C in Dec-Jan
Khao Yai	Nov – Feb	Aug – Oct	Dry, cool weather; leeches less active; elephant sightings peak
Mu Ko Similan	Feb – Apr	May – Oct (closed)	Calmest seas, best visibility (30+ meters), manta ray season
Mu Ko Ang Thong	Feb – Oct	Nov – Dec (closed)	Park closes during Gulf monsoon; Feb-Apr driest
Kaeng Krachan	Nov – Apr	Aug – Oct	Mountain roads close in heavy rain; leeches peak in wet season
Sri Lanna	Nov – Mar	Jun – Sep	Reservoir highest in cool season; smoke haze possible Mar-Apr
Doi Suthep-Pui	Nov – Feb	Mar – Apr	Burning season = severe smog in Chiang Mai; avoid Mar-Apr
Khao Sam Roi Yot	Nov – Apr	Sep – Oct	Phraya Nakhon Cave best with midday sun (10 AM – 12 PM)

What to Bring to Thai National Parks

✓Plenty of water (1.5-2 liters per person minimum — no shops on trails)
✓Reef-safe sunscreen (SPF 50+ — chemical sunscreens banned in marine parks)
✓Sturdy closed-toe shoes (not flip-flops — trails are rocky and slippery)
✓Lightweight rain jacket or poncho (rain can come suddenly even in dry season)
✓Strong insect repellent with DEET (mosquitoes, sandflies, leeches in wet season)
✓Cash in small bills (no ATMs inside parks — needed for food, rental, guides)
✓Headlamp or flashlight with spare batteries (essential for camping and night safaris)
✓Energy snacks and a packed lunch (trail food options are very limited)
✓Camera with zoom lens or binoculars (wildlife keeps its distance)
✓Dry bag or waterproof pouch (for phone and electronics during rain or boat trips)
✓Leech socks (for Khao Yai, Kaeng Krachan in wet season — buy at park entrance)

Practical Tips for Thai National Parks

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Book camping online in advance

Use nps.dnp.go.th to reserve campsites and tent rentals. Popular parks like Khao Yai and Erawan sell out weeks in advance during holidays and long weekends. Walk-ins are risky — don't count on availability.

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Bring cash — no cards accepted

Entry fees, camping fees, food stalls, and guide fees are all cash-only inside the parks. The nearest ATM is often 30-60 minutes away. Bring at least 1,000-2,000 THB per person for a day trip, more for overnight stays.

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Hire a local guide for wildlife

Park rangers and licensed guides know exactly where elephants, gibbons, and hornbills feed and rest. A half-day guide costs 500-1,500 THB depending on the park and group size. At Khao Yai, night safari tours with guides (800-1,200 THB) offer sightings of civets, porcupines, and sambar deer.

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Start hikes early in the morning

Hit the trails by 6-7 AM. Morning hours are cooler, wildlife is most active, and you avoid the midday heat (35°C+). At Erawan, arriving at park opening (8 AM) means you'll reach the upper tiers before the crowds. Most parks close trail access by 3-4 PM.

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Check park status before you go

Parks can close trails on short notice due to rain, wildlife activity, or maintenance. Check the DNP Facebook page (they're more active there than on the website) or call the park office directly. Google Maps reviews also often have recent visitor reports.

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Respect the dual pricing system

Foreign visitors pay 200-500 THB entry while Thai nationals pay 40-100 THB. This is standard practice and funds park conservation. The higher fee is still very affordable compared to national parks in Europe, the US, or Australia. Consider it a contribution to protecting these incredible ecosystems.

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Don't feed or approach wildlife

Feeding wildlife is illegal in Thai national parks (fine up to 100,000 THB). Macaques that are fed become aggressive. Elephants that associate humans with food become dangerous. Keep 30+ meters from elephants and never get between a mother and calf. Use a zoom lens for photos, not your feet.

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Consider weekdays over weekends

Thai national parks get very crowded on weekends and public holidays — especially Erawan, Khao Yai, and Doi Inthanon. Weekday visits mean fewer crowds, easier parking, available campsites, and a much better chance of wildlife sightings. If you can only go on weekends, arrive at opening time.

Common Questions

Frequently Asked Questions

How much does it cost to enter a national park in Thailand?▼

Foreign adults pay 200-500 THB ($6-14) depending on the park, and children 100-300 THB. Thai nationals pay 40-100 THB. Vehicle fees are typically 30-50 THB for cars and 20 THB for motorcycles. The most expensive parks are Khao Yai (400 THB) and Mu Ko Similan (500 THB). Payment is cash only at the park entrance.

Can I camp in Thai national parks?▼

Yes, many national parks have designated campgrounds. Book through the official DNP website (nps.dnp.go.th). You can bring your own tent or rent one (150-450 THB/night). Sleeping bags rent for 30-60 THB/night. Facilities include shared bathrooms with cold-water showers. Popular parks book out weeks in advance during Thai holidays — reserve early.

Which national park is closest to Bangkok?▼

Khao Yai is the most popular option at about 2.5 hours northeast of Bangkok by car. Erawan National Park (Kanchanaburi) is about 3 hours west. Khao Sam Roi Yot is about 3.5 hours south. All three are doable as day trips, but spending at least one night is recommended to fully enjoy the park, especially for wildlife spotting.

When do the Similan Islands open and close?▼

Mu Ko Similan National Park opens around mid-October and closes mid-May every year. The exact dates vary slightly each season. The best conditions for diving and snorkeling are February through April when seas are calmest and visibility exceeds 30 meters. Daily visitor numbers are capped at 3,325 people — book boat trips in advance during peak season (December-March).

Is it safe to hike in Thai national parks?▼

Generally yes, but take precautions. Stay on marked trails — getting lost in tropical jungle is dangerous. Watch for leeches in wet season (not harmful, just unpleasant), and bring leech socks for parks like Khao Yai and Kaeng Krachan. Snakes exist but rarely encountered on main trails. The biggest real risks are heat exhaustion (carry enough water), slippery rocks near waterfalls, and flash floods during rainy season. Always tell someone your hiking plan.

Do I need a guide for Thai national parks?▼

Not required for most main trails, but highly recommended for wildlife spotting and multi-day treks. Park guides cost 500-1,500 THB per half-day depending on the park. At Khao Yai, guided night safaris (800-1,200 THB) are the best way to see nocturnal wildlife. At Kaeng Krachan, a guide is essential for reaching the remote viewpoints. Some trails, like Kew Mae Pan at Doi Inthanon, require a mandatory guide.

Can I see wild elephants in Thailand's national parks?▼

Yes! Khao Yai is the best-known park for wild elephant sightings — herds regularly visit salt licks, especially around dusk. Kaeng Krachan and Kui Buri (near Prachuap Khiri Khan) are other excellent spots. Sightings are never guaranteed but a local guide dramatically increases your chances. Keep at least 30 meters distance and never use flash photography. Wild elephants are unpredictable — they are not like the tamed elephants at tourist sanctuaries.

Are Thai national parks crowded?▼

It depends on timing. Erawan, Khao Yai, and Doi Inthanon get very crowded on weekends and Thai public holidays (Songkran in April, New Year). Weekday visits are dramatically quieter. Less-known parks like Sri Lanna, Kaeng Krachan, and Khao Sam Roi Yot are rarely crowded even on weekends. For the Similan Islands, the daily cap of 3,325 visitors helps manage crowds, but book early in high season.

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