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Cheow Lan Lake is man-made and surrounded by mountains and rainforest. It was made by the flooding of a large valley in 1982 for the hydro-electric power station.

The best time for a visit to this beautiful region is the dry season from December to late April. It’s Thailand’s wettest region with an annual rainfall of 3.500 mm. The reason is the limestone mountain range from north to south. It gets hit by the monsoons from the Andaman Sea and the Gulf of Thailand between late April and end of November. In the rainy season, it’s very rare to spot wildlife at the lake. Trails are slippery; it’s cold and wet on the one or two hours boat rides. The famous Nam Talu Cave is closed in the rainy season since it got flooded and people died.

Boat transfer on the Cheow Lan Lake in the Khao Sok National Park

The boat tours which are usually offered are for bigger groups, and it takes around an hour to get to one of the raft houses. These groups visit the easy accessible Coral Cave (Pakarang Cave) mostly as we did instead of the adventurous water flooded Nam Talu Cave. Ask before booking! Overall these trips are nice to get an idea of the immense size of the lake. The price p.p. in a group for one day visit is roughly 1.500 Baht / 40 € / $ 45 plus 300 Baht / 8 € / 9 $ National Park fee.

Weather

The dry season lasts from December to late April. Anyway, showers can also occur in the dry season and especially in the rainforest. The hottest months are March and April with temps up to 34°C and even more and high humidity. The rainy season starts roughly late April until the end of November. Most precipitation from May to July and from October to November.

Beautiful limestone karst formations on the Cheow Lan Lake

Crowds

The lake pier is always crowded but as soon as the longtail boat leaves the dock the crowds disappear. There are plenty of boats with tourists, but they have good timing not too many people visit one of the caves at the same time. Lunch is served on one of the many floating raft houses. It was very well organized that people can enjoy the marvelous scenery. 

Top Tip

To experience the amazing rainforest, wildlife, and birds it's recommended to book a private tour far to the north-west. To get there, it takes minimum two hours by boat. The only available accommodation is basic and running by the National Park. Early morning you may spot wildlife by boat along the lake. Of course, independent tours are expensive and need to be booked in advance.

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