Khao Sok National Park

Khao Sok’s Rainforest Is Older Than the Amazon by 100 Million Years

That is not a typo or exaggeration. The rainforest in Khao Sok National Park in Surat Thani province, southern Thailand, is estimated at 160 million years old. The Amazon formed around 55 million years ago. Khao Sok existed before flowering plants were common. The biodiversity that accumulated over that timespan includes 48 mammal species, 311 bird species, and the Rafflesia kerrii – the plant that produces the world’s largest individual flower, up to 80 centimetres across, which smells intensely of rotting meat to attract carrion flies for pollination. Sightings are seasonal and unpredictable. You either encounter one or you do not.

Most visitors driving between Krabi and Koh Samui pass through without stopping. This is a consistent mistake that many of them later regret.

Cheow Lan Lake

The headline experience is not the forest trail but the lake. Cheow Lan was created in 1982 when a dam flooded a valley, and the result is 165 square kilometres of water surrounded by vertical limestone karst peaks that rise directly from the surface like blades from a rack. The landscape from the water looks like something edited into the frame. Longtail boats are the only way to get around; local operators near the dam – about 65 kilometres from Khao Sok village – run full-day and overnight trips.

Spending a night on a floating bungalow in the middle of the lake, with no artificial light visible, the peaks silhouetted at first light, and white-handed gibbons calling from the surrounding forest before dawn, is one of the genuinely distinctive experiences available anywhere in Thai tourism. Floating bungalows range from basic wooden platforms with mosquito nets at around 800 baht per person including meals to more comfortable private-deck versions at up to 2,500 baht. Book ahead in high season. The rainy season (May through October) sometimes restricts access due to rough water, but the park itself remains open and the jungle is more intensely green than at any other time of year.

The Village and Forest Trails

Khao Sok village is a functional strip of guesthouses, restaurants, and tour operators. Fan bungalows from about 350 baht per night. The trail network entrance costs 300 baht for foreign visitors. The most popular route follows the Sok River upstream to swimming pools and a waterfall, takes three to four hours return, and involves river crossings that require waterproof sandals you should bring from home rather than buy in the village.

Night safaris – guided walks after dark – run through most operators for 500 to 800 baht and are worth booking. Wildlife activity increases significantly after dark: civets, large spiders, possible leopard cat sightings, and always gibbons whose pre-dawn calls carry for kilometres through the forest.

Wildlife: What to Expect Honestly

Tigers, elephants, tapirs, and gaurs live in Khao Sok. Encounters for day visitors are extremely rare. What you will reliably see: gibbons, long-tailed macaques, hornbills, and with reasonable luck a dusky langur. This remains excellent wildlife watching by any Southeast Asian standard. The disappointment only arrives if you come expecting guaranteed charismatic megafauna.

The gibbons begin calling around 05:30. Being at the park boundary before dawn is worth the alarm for the sound alone, even if you see nothing.

Getting There

About two hours by road from Surat Thani town, two and a half from Krabi, three from Phuket. Daily minivans from Surat Thani and Krabi cost 150 to 250 baht. Most visitors arrive while travelling between Bangkok (or the Koh Samui ferry) and the Andaman coast, which makes Khao Sok a natural stop between two tourist zones that are both more crowded and less interesting than what sits between them.

Bring strong insect repellent, accept that you will be damp, and do not underestimate the leeches in wet season. They are harmless but numerous and guaranteed to surprise first-timers.