Nestled in the heart of southern Thailand, Khao Sok National Park shelters one of the oldest tropical rainforests in the world. Karst peaks rising from an emerald lake, jungle dating back 160 million years, floating bungalows at dawn beneath the mist: this gem of Surat Thani province deserves a visit for anyone seeking a wild retreat between Phuket and Krabi.

At a Glance

• Location: Surat Thani Province, southern Thailand

• Area: 739 km² of humid tropical rainforest

• Forest Age: over 160 million years old (older than the Amazon)

• Must-see: Cheow Larn Lake and its floating bungalows

• Best Time: December to April (dry season)

• Entrance Fee: 300 baht adult (≈$8 USD)

• Recommended Duration: 2 to 4 days

History of the Park

Founded in 1981, Khao Sok National Park was established to protect virgin forest whose humid tropical vegetation is considered among the oldest in the world. Dating back over 160 million years, it predates the Amazon rainforest and even surpasses it in species diversity.

Beyond its lush jungle, this protected area is famous for its lake and karst cliffs rising from the water. The landscape recalls that of Phang Nga Bay in the south, Guilin in China, and Ha Long Bay in Vietnam.

The construction of the Ratchaprapha Dam in 1982 gave birth to Cheow Larn Lake, submerging entire valleys and reshaping the spectacular landscape we see today.

The Rainforest and Its Biodiversity

The park spans 739 km² between the Gulf of Thailand and the Andaman Sea, which means it receives rainfall almost year-round. This constant humidity explains the exceptional richness of its fauna and flora.

The gibbon remains the star animal, and its morning call often accompanies the first rays of sunlight. Over 300 bird species have been recorded, as well as barking deer, tapirs, gaurs, Asian black bears, leopards, and numerous reptiles including pythons and cobras.

During treks, you'll encounter gigantic trees reaching up to 65 meters in height. From November to January, you may have the chance to see the Rafflesia, the world's largest flower at 90 cm across: a rare encounter that rewards several hours of hiking.

What to Do at Khao Sok?

Jungle Treks and Hiking

Several formats exist for exploring Khao Sok's jungle: day excursions on marked trails from the visitor center, two-day treks with camping, or guided night safaris to observe wildlife in activity after sunset.

The paths traverse water features, waterfalls, and caves at the base of karst peaks. A local guide remains essential once you venture beyond the main trails: vegetation closes in quickly and signage becomes sparse.

Cheow Larn Lake and Floating Bungalows

Cheow Larn Lake, dotted with karst peaks and thousands of pinnacles, offers one of the most striking landscapes in southern Thailand. Floating bungalows perched on the water allow you to spend the night and witness the sunset over the cliffs.

At dawn, mist gradually reveals limestone rocks and lush vegetation in a mysterious atmosphere. Calm envelops the area once the water taxis depart, leaving you with the sensation of being alone in the world.

Kayaking on the Sok River and Sunset

Kayaking on the Sok River provides a silent approach to wildlife: monitors, birds, sometimes macaques on the banks. Late afternoon outings on the lake, when golden light strikes the karst peaks, rank among the highlights of a stay at Khao Sok.

Caves in the Park

The park harbors several caverns accessible to caving enthusiasts. It's best to venture into them during the dry season: from May to December, caves can quickly flood, and most local guides refuse to take you for safety reasons.

Among the main caves:

• Nam Talu Cave

• Pra Kay Petch Cave

• Pangkarang Cave

Waterfalls at Khao Sok

During a guided walk through the park, several waterfalls dot the trails:

• Ton Kloi

• Bang Lab Nam

• Tharn Sawan

• Wing Hin

• Mai Yai

• Bang Hua Rat

Ethical Elephant Encounters

Several sanctuaries on the park's periphery offer ethical programs (no riding, no performances) where you observe and feed elephants in their environment. Always inquire about the establishment's practices before booking: the mention of "no riding, no bathing" is a good indicator of a serious ethical approach.

When to Visit Khao Sok?

The best time to visit the park extends from late December to April, during the dry season. Trails are passable, caves accessible, and lake waters clearer.

• December – February: ideal period, mild temperatures (24-30 °C), low humidity, perfect for longer treks.

• March – April: increasing heat, jungle still dry, good window for Rafflesia sightings early in the period.

• May – June: start of the wet season, short but intense downpours, explosive vegetation.

• July – October: more regular rainfall, some treks closed, but spectacular misty atmosphere over the lake.

• November: transition, still humid but possibility of spotting Rafflesia.

Note: the park receives rain almost year-round due to its position between two seas, so showers remain possible even in the dry season.

How to Get to Khao Sok?

From Phuket

Buses regularly depart from Phuket starting at 7 a.m. The journey takes approximately 4 hours and costs around 160 baht.

From Surat Thani

Buses serve Khao Sok daily from Surat Thani until mid-afternoon. Allow 2 hours for the journey. This is the most practical option if you arrive on an overnight train from Bangkok.

From Krabi

The distance between Krabi and Khao Sok is approximately 160 km, roughly 2.5 hours by car. Shared minibuses operate this route for around 250 baht.

From Khao Lak

At just 52 km away, Khao Lak is the closest gateway. Allow 1 hour and 15 minutes of driving. Many travelers combine a beach stay in Khao Lak with jungle exploration at Khao Sok on the same trip.

From Bangkok

The overnight train to Surat Thani (approximately 11 hours) is a romantic and budget-friendly option, followed by a 2-hour bus transfer. Alternatively, fly to Surat Thani or Phuket then take a bus.

Where to Stay in Khao Sok?

Three main accommodation types coexist around the park, depending on your budget and desired experience.

• Guesthouses and Simple Bungalows (€15-30/night): concentrated in Khao Sok village near the park entrance. Basic comfort, backpacker atmosphere, perfect for exploring the area.

• Boutique Hotels and Family Lodges (€60-120/night): well-appointed bungalows by the jungle or river, pool, on-site restaurant. The right balance between comfort and immersion.

• Floating Bungalows on Cheow Larn Lake (from €80/night, transfers included): Khao Sok's signature experience. Comfort varies by operator, from rustic to all-inclusive luxury.

• Upscale Lodges (€150+/night): safari tents, tree-houses, premium services in preserved settings.

For a first visit, many combine one night in the village (easy transfers, morning treks) and one night in a floating bungalow on the lake.

Insider Tips from Our English-Speaking Local Expert

• Book the Lake in Advance: floating bungalows sell out quickly during high season (December-February), especially on Thai weekends.

• Start Early: kayaking or treks beginning at 6:30 a.m. offer the best wildlife sightings and beat the heat.

• Keep Your Entrance Ticket: it grants access to the Ratchaprapha Dam, the starting point for lake excursions.

• Bring Cash: few ATMs in the village, and most local operators don't accept cards.

• Insect Repellent and Closed-Toe Shoes: leeches present during wet season, essential on the trails.

• Avoid Bathing Elephant Programs: choose a sanctuary that prohibits both riding and bathing, a mark of serious ethical practice.

Who Is It For?

• Nature and Jungle Lovers: the world's oldest rainforest, wildlife observation, varied treks.

• Couples Seeking Escape: nights in floating bungalows at sunrise, kayaking at sunset.

• Families: accessible walks, elephant sanctuaries, lake swimming. Children adore floating bungalows.

• Photographers: karst peaks, morning mist, diurnal and nocturnal fauna.

• Travelers on Beach-Jungle Combinations: 1 hour from Khao Lak, the perfect stop before or after Andaman islands.

Practical Information

• Entrance Fee: 300 baht adult (≈$8 USD), 150 baht child.

• Hours: open year-round from 8 a.m. to 6 p.m.

• Your Ticket Includes Access to the Ratchaprapha Dam, keep it safe.

• Local Guides: essential for caves, long treks, and night safaris.

• Connectivity: limited Wi-Fi in the village, none on the lake.

Also Discover in the Region

• Khao Lak – Andaman beaches and gateway to the Similan Islands, 52 km away.

• Surat Thani – hub town and railway junction to Koh Samui and Koh Phangan, 42 km away.

• Phang Nga Bay – karst peaks at sea, the maritime echo of Khao Sok's landscape.

• Koh Yao Noi Island – unspoiled island between Phuket and Krabi.

• Ko Phra Thong – wild island and coastal savannas, 44 km away.

• Khura Buri District – departure point for the Surin Islands.

Build Your Khao Sok Journey with Our Local Agency

Our English-speaking local expert designs custom itineraries blending Khao Sok with the Andaman coast, southern islands, or northern classics. Treks, nights in floating bungalows, ethical elephant sanctuaries, private transfers: we tailor each stage to your pace and budget.

Khao Sok features notably in our programs Thai Delights (10 days, from €1,390), Southern Islands for Couples (14 days, from €1,490), Thailand with the Family (15 days, from €1,890), and Grand Discovery of Southern Thailand (18 days).

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