Rajjaprabha Dam (also widely known as the Cheow Lan Lake) is a major hydroelectric dam located within the stunning Khao Sok National Park in the Surat Thani province of Southern Thailand.

 

Overview and History

 

• The Name: The name "Rajjaprabha" was bestowed by King Bhumibol Adulyadej and translates to "Light of the Kingdom."

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• Purpose: Constructed by the Electricity Generating Authority of Thailand (EGAT) and inaugurated in 1987, the dam serves multiple purposes: hydroelectric power generation, irrigation, flood control, and as a significant center for regional tourism and fisheries.

 

• The Reservoir: The construction created Cheow Lan Lake, a massive, breathtaking man-made reservoir covering approximately 165 square kilometers. The lake is famous for its emerald-green waters, ancient rainforest surroundings, and iconic limestone karst formations that rise dramatically from the water—often drawing comparisons to the landscape of Guilin, China.

 

Experiences and Activities

 

The area is a premier destination for nature lovers and adventure seekers:

 

• Longtail Boat Tours: The primary way to explore the lake. These tours take visitors through hidden coves, past limestone cliffs, and to scenic viewpoints.

 

• Floating Bungalows: A unique accommodation experience. Staying overnight in a floating raft house allows you to fully immerse yourself in the quiet wilderness, wake up to sunrise views over the mist-covered lake, and easily access the water for swimming or kayaking.

 

• Wildlife & Nature: The reservoir is surrounded by protected wildlife sanctuaries, home to diverse species including elephants, wildcats, various primates, and an array of tropical birds and plants.

 

• Adventure: Popular activities include kayaking, jungle trekking, and exploring nearby caves.

 

Visitor Information

 

• Getting There: The access point is in the Ban Ta Khun district of Surat Thani province. The dam area is well-signposted along Route 401.

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• Entry Fees: Visitors must pay a National Park entrance fee to access the lake and participate in boat tours.

 

• Best Time to Visit: While it is a year-round destination, early mornings are highly recommended to witness the famous lake mist and enjoy the tranquility before day-tour crowds arrive. The dry season (November–April) generally offers the clearest skies and calmest waters.

 

• Travel Tips: Pack Accordingly: Bring essentials like a waterproof bag for electronics, sunscreen, insect repellent, and footwear suitable for both boat trips and potential hiking.

 

• Book Ahead: Especially during weekends and holidays, it is wise to arrange your boat tours and accommodation in advance as they can fill up quickly.

 

Are you currently planning a trip to Khao Sok and need help with tour recommendations or logistics? Las Orquideas Resorts offers a full day Cheow Lan Lake exploration tour as well a a 2 Day Overnight tour with a stay in a deluxe bamboo bungalow at a floating raft-house on Cheow Lan Lake. Contact us using the form below for all the details.