Khao Sok National Park, Thailand
If you’re planning a visit to Khao Sok National Park, welcome. Whether you’re just beginning your research or counting down the days until you arrive, we hope this page helps you make the most of your visit.
Few places in Thailand capture the imagination quite like Khao Sok National Park. Ancient rainforest, towering limestone cliffs and remarkable wildlife combine to create one of the country’s most extraordinary natural landscapes. It’s a place to slow down, explore and reconnect with nature. Every trail, viewpoint and journey has a story waiting to be discovered.
This page answers many of the questions we’re asked by visitors every week. Along the way you’ll find practical advice, local knowledge and a few of the small observations we’ve gathered from years of helping guests discover this remarkable place that we’re fortunate enough to call home.
Planning Your Visit
Jump straight to the section you’re looking for, or simply read on.
🧭 Where Is Everything?
Understand the layout of Khao Sok National Park and where the main attractions are located.
🌿 What Makes Khao Sok National Park Unique?
Discover why this ancient rainforest is unlike anywhere else in Thailand.
🦜 Wildlife of Khao Sok National Park
Explore the remarkable animals and plants that thrive in this ancient rainforest.
🚤 Exploring Cheow Lan Lake
Discover the history, scenery and unforgettable experiences of Cheow Lan Lake.
🌦️ When Is the Best Time to Visit?
Learn how the changing seasons shape the Khao Sok experience.
❓ Practical Visitor Information
Quick answers to the questions visitors ask most before arriving in Khao Sok.
📖 The History of Khao Sok National Park
Follow the remarkable story of how nature, people and conservation shaped the National Park.
Where Is Everything?
One of the questions we’re asked most often is surprisingly simple:
“Where exactly is everything?”
It’s a fair question. Khao Sok National Park is experienced through several distinct areas rather than a single entrance or visitor centre. The National Park Headquarters, Khao Sok Village, the Sok River, Cheow Lan Lake and Rajjaprabha Dam all play an important role in a visit to the park, but they are not all in the same place.
The map below shows how these key locations relate to one another, helping you understand the layout of Khao Sok National Park before you begin exploring.
Understanding Khao Sok National Park
Khao Sok National Park is explored through two main gateways. Khao Sok Village is home to the National Park Headquarters and most accommodation, while Rajjaprabha Dam is the departure point for Cheow Lan Lake, floating bungalows and lake tours. The map also highlights one of the biggest surprises for first-time visitors: the Sok River lies outside the National Park boundary, even though many of Khao Sok’s most popular river activities take place there.
Khao Sok at a Glance
| Staying in Khao Sok Village | Visiting Cheow Lan Lake |
|---|---|
| Main gateway to the National Park | Main gateway to the lake |
| National Park Headquarters | Rajjaprabha Dam Boat Pier |
| Hotels, resorts & guesthouses | Floating bungalow stays |
| Restaurants, cafés, shops & pharmacy | No towns or visitor facilities |
| Hiking, river adventures & local experiences | Boat tours, caves & wildlife safaris |
| Canoeing, bamboo rafting & tubing | Longtail boats & kayaking |
| Village atmosphere | Remote wilderness |
| Ideal base for exploring Khao Sok | Iconic day & overnight experience |
Did you know?
Many first-time visitors assume that Khao Sok Village sits beside Cheow Lan Lake. In fact, the two are around 64 km apart, connected by Route 401 through the southern edge of the National Park.
Most visitors stay in Khao Sok Village and travel to the lake for the day or as part of an overnight tour, making it easy to experience both sides of the National Park during the same visit.
What Makes Khao Sok National Park Unique?
Khao Sok National Park is one of Thailand’s most remarkable natural landscapes. Towering limestone mountains rise above ancient evergreen rainforest, while hidden caves and waterfalls reveal a landscape shaped over millions of years. The creation of Cheow Lan Lake in the 1980s added another distinctive feature, transforming part of the park into a maze of limestone islands and sheltered bays.
The rainforest is just as extraordinary. Scientists believe parts of Khao Sok are among the oldest continuously evolving evergreen rainforests on Earth.
Combined with a warm tropical climate and abundant rainfall, these forests support an exceptional variety of plants and wildlife. Tiny orchids grow alongside giant Rafflesia flowers, while hornbills, gibbons, elephants and the elusive clouded leopard all call this remarkable rainforest home.
Although Khao Sok National Park covers 739 square kilometres, the rainforest extends far beyond its official boundaries. Together with neighbouring protected areas, including Khlong Phanom National Park, it forms one of Thailand’s largest remaining protected rainforest landscapes.
For wildlife and plants, there are no signposts or park boundaries. The rainforest continues long after the National Park boundary ends.
Did you know?
Parts of Khao Sok’s evergreen rainforest are believed to be older than the Amazon. Having survived major climatic changes over millions of years, it is considered one of the oldest continuously evolving rainforests on Earth.
Now that you know how Khao Sok National Park is laid out and what makes it so special, let’s take a closer look at the rainforest and the remarkable wildlife that calls it home.
Wildlife of Khao Sok National Park
One of the greatest attractions of Khao Sok National Park is its extraordinary wildlife. Although sightings are never guaranteed, every visit offers the opportunity to experience one of Thailand’s richest rainforest ecosystems.
The rainforest is home to an incredible variety of mammals, birds, reptiles, insects and plants. Visitors may be lucky enough to spot hornbills gliding between the limestone cliffs, hear white-handed gibbons calling through the forest canopy at dawn, or catch a glimpse of dusky langurs, macaques or colourful butterflies along a jungle trail.
Larger animals such as Asian elephants, tapirs and the elusive clouded leopard also inhabit the forest, although they are rarely seen. Their presence is a reminder that Khao Sok remains a genuinely wild landscape where nature still follows its own rhythms.
Wildlife is not confined to the National Park’s hiking trails. The Sok River, Cheow Lan Lake and the forests surrounding Khao Sok Village all provide excellent opportunities to observe birds, reptiles and other rainforest species. Sometimes the most memorable encounters happen when you’re simply sitting quietly and taking in your surroundings.
Explore our Khao Sok Wildlife Guide →
Local Knowledge
Guests often ask us what wildlife they are most likely to see. The honest answer is that every day is different. Some visitors are treated to hornbills flying overhead before breakfast, while others remember the haunting calls of gibbons echoing through the forest long after they have returned home. In Khao Sok, patience is often rewarded.
Did you know?
The Rafflesia, the world’s largest flower, grows naturally in Khao Sok National Park. It can reach almost one metre in diameter, blooms for only a few days and produces a distinctive scent that attracts insects for pollination.
To learn more about the remarkable animals and plants that live here, explore our Khao Sok Wildlife Guide, where you’ll find detailed information about mammals, birds, reptiles, insects and rainforest plants, along with the best places and activities for spotting them.
Exploring Cheow Lan Lake
Cheow Lan Lake lies at the heart of Khao Sok National Park. Towering limestone mountains and ancient rainforest surround its calm emerald waters. Longtail boats weave through narrow channels and hidden bays, revealing one of Thailand’s most remarkable landscapes.
Although it looks completely natural today, Cheow Lan Lake is a man-made reservoir. It was created after the construction of Rajjaprabha Dam in the early 1980s. Flooding the Pasaeng River valley transformed the landscape into the maze of limestone islands visitors see today.
The lake changed far more than the scenery. Before the reservoir was filled, five villages stood in the Pasaeng River valley. Their residents were carefully relocated, while homes, farms, schools and temples disappeared beneath the rising water. Today, that hidden landscape forms one of the most fascinating chapters in the history of Khao Sok National Park.
One of the best ways to experience the lake is by staying in a floating bungalow. They are the only accommodation within Khao Sok National Park. Once the day boats return to the dam, the lake becomes quieter. Wildlife is often more active, and dawn brings mist drifting between the towering limestone mountains.
Whether you visit for a day or stay overnight, Cheow Lan Lake offers unforgettable experiences. Cruise beneath towering limestone cliffs, hike through ancient rainforest, swim in warm emerald water and watch for wildlife along the shoreline. Many tours also include a visit to one of the lake’s impressive caves.
Cheow Lan Lake at a Glance
| Feature | Details |
|---|---|
| Location | In the heart of Khao Sok National Park |
| Size | Approximately 165–185 km² (seasonal water levels) |
| Maximum depth | Around 90–94 metres |
| Transport | Longtail boat |
| Typical activities | Boat safari, rainforest hiking, swimming, kayaking, wildlife watching and cave exploration |
| Accommodation | Floating bungalows (the only accommodation inside the National Park) |
| Visit options | Full-day and overnight tours |
| Best known for | Towering limestone karsts, floating bungalows and dramatic scenery |
| Often called | “The Guilin of Thailand” |
Did you know?
Cheow Lan Lake is actually a man-made reservoir. It generates renewable hydroelectric power, provides water for irrigation and supports local fisheries. Today, it is also one of Thailand’s most spectacular travel destinations.
How to Experience Cheow Lan Lake
Whether you have one day or several nights in Khao Sok, there are different ways to experience Cheow Lan Lake. A full-day tour offers an excellent introduction to the lake, while an overnight stay allows you to enjoy its quieter moments after the day boats have returned to the dam.
If you’re staying at Riverside Cottages, our most popular packages include:
- Riverside & Raft House – Our most popular choice, combining a stay at Riverside Cottages with an unforgettable night on a floating bungalow.
- Grand Jungle Tour – A longer itinerary combining Cheow Lan Lake with additional rainforest experiences for those wanting to explore more of Khao Sok.
- Rainforest Adventure – Ideal for guests who would like to experience Cheow Lan Lake on a full-day guided tour.
When Is the Best Time to Visit?
Khao Sok National Park can be visited throughout the year, and every season offers something different. There isn’t a single “best” time to visit. The ideal season depends on the experiences you’re looking for.
The dry months generally offer easier hiking conditions and more comfortable sightseeing. During the rainy season, the rainforest becomes even more vibrant, waterfalls are at their most impressive and river activities become more adventurous. Short tropical downpours are common, but they rarely last all day.
Rather than avoiding the rainy season, many visitors discover that it offers one of the most rewarding times to experience Khao Sok. The forest is at its greenest, the rivers are full of life and the National Park feels wonderfully alive.
| Season | What to Expect |
|---|---|
| November – February | Generally cooler and drier, with lower humidity and more comfortable daytime conditions. |
| March – May | Hotter weather, strong sunshine and occasional heavy showers as the rainy season approaches. |
| June – October | Frequent tropical rain, lush rainforest, fuller waterfalls and faster river conditions. |
Did you know?
Rain is one of the reasons Khao Sok exists. The abundant rainfall supports one of the world’s oldest evergreen rainforests, keeping the rivers, waterfalls and forests alive throughout the year.
Practical Visitor Information
A little preparation goes a long way in Khao Sok National Park. Most visitors need nothing more than comfortable footwear, lightweight clothing and a sense of adventure. Here are some of the questions we’re asked most often before guests arrive.
| Question | Answer |
|---|---|
| Is it safe to swim in Cheow Lan Lake? | Yes. Swimming is one of the highlights of visiting Cheow Lan Lake and most tours include time to enjoy the water. Always follow your guide’s advice and swim only in designated areas. |
| Can I stay inside Khao Sok National Park? | Yes. The only accommodation inside the National Park is on the floating bungalows at Cheow Lan Lake. All hotels, resorts and guesthouses are located outside the park boundaries. |
| Do I need a guide to visit Khao Sok National Park? | Most rainforest hikes and lake activities are enjoyed with an experienced guide. Some shorter trails near the National Park Headquarters can be explored independently. |
| How many days should I spend in Khao Sok? | We usually recommend at least three days. This gives you enough time to experience both the rainforest around Khao Sok Village and Cheow Lan Lake without feeling rushed. |
| Can I see elephants in Khao Sok National Park? | Wild elephants live in the National Park but are rarely seen. Most visitors are more likely to encounter hornbills, gibbons, macaques and other rainforest wildlife. |
| Is Khao Sok suitable for families? | Yes. Many activities are suitable for children, although some hikes and cave tours are better suited to older children and active families. |
| Are there crocodiles in Cheow Lan Lake? | No. There are no crocodiles in Cheow Lan Lake. |
| Is the rainy season a good time to visit? | Absolutely. The rainforest is at its greenest, waterfalls are at their most spectacular and many visitors consider it one of the best times to experience Khao Sok. |
The History of Khao Sok National Park
The history of Khao Sok National Park is a remarkable story of ancient geology, tropical rainforest, conservation and human resilience. Millions of years of natural change, together with more recent events, have shaped the extraordinary landscape visitors experience today.
Nature Creates Khao Sok
Millions of years ago, much of southern Thailand lay beneath a shallow tropical sea where thick layers of limestone slowly formed. As the land rose, rivers and tropical rainfall gradually carved towering cliffs, caves and hidden valleys into the landscape.
Over time, one of the world’s oldest evergreen rainforests developed across these limestone mountains. The combination of ancient geology, abundant rainfall and a warm tropical climate created the remarkable environment visitors enjoy today.
A Forest Worth Protecting
During the 1960s and 1970s, large areas of Thailand’s rainforest were cleared for logging and mining. The construction of Highway 401 opened much of the region to commercial exploitation, and parts of Khao Sok suffered environmental damage through forest clearance, mining and soil erosion.
Fortunately, the most remote valleys escaped the worst of this destruction. Between 1975 and 1982, student activists and communist insurgents established bases deep within the mountains. Their presence discouraged both military operations and commercial logging in these remote forests. Although an unexpected consequence of a turbulent period in Thailand’s history, many local people believe it played an important role in preserving the wilderness visitors experience today.
A National Park is Born
Recognising the importance of protecting what remained, Khao Sok National Park was officially established on 22 December 1980. Commercial logging and mining within the park came to an end, allowing the rainforest and its wildlife to recover naturally.
Today, together with neighbouring protected areas including Khlong Phanom National Park, Khao Sok forms one of the largest remaining protected rainforest landscapes in southern Thailand.
The Creation of Cheow Lan Lake
In 1987, the completion of Rajjaprabha Dam across the Pasaeng River transformed another part of Khao Sok forever. The rising water created Cheow Lan Lake, flooding the valley to form today’s spectacular landscape of limestone islands and sheltered bays.
The reservoir provides hydroelectric power, flood control, irrigation for agriculture and productive fisheries, while also supporting one of Thailand’s most distinctive tourism destinations. The project required the careful relocation of five villages before the valley was flooded. Many of the families adapted to new ways of life, and today their descendants continue to play an important role in the communities and tourism that surround Cheow Lan Lake.
Cheow Lan Lake is one of the defining features of Khao Sok National Park, attracting visitors from around the world while continuing to support both local communities and conservation.
Did you know?
More than a thousand years before paved roads reached Khao Sok, this area formed part of an important overland trade route linking China and India. Rivers and jungle trails were the highways of their day, carrying traders and local communities through the rainforest for centuries. Today’s bamboo rafting experiences are based on these traditional methods of river travel, offering a glimpse into how people once journeyed through the forest.
Ready to Explore Khao Sok?
Khao Sok National Park offers far more than a single day trip. Whether you’re planning a rainforest hike, an overnight stay on Cheow Lan Lake or simply a few days surrounded by nature, spending a little more time here allows you to experience everything that makes this remarkable National Park so special.
At Riverside Cottages, we’ve spent many years helping visitors discover the best of Khao Sok. Our accommodation, guided tours and carefully planned packages make it easy to experience both the ancient rainforest around Khao Sok Village and the spectacular scenery of Cheow Lan Lake.