It is the longest clay-core earth-fill dam in Thailand.
The reservoir covers approximately 126 square kilometers when filled to capacity.
It serves as the final component of the Pasak River development project initiated by King Rama IX.
The dam's structure was engineered to hold approximately 960 million cubic meters of water.
During the dry season, the reservoir levels drop significantly, occasionally revealing remnants of submerged structures from the area before flooding.
A specialized tourist train route operates seasonally, crossing the dam via the railway tracks.
The dam was officially inaugurated in 1999.
Pasak Chonlasit Dam is the longest earthen dam in Thailand, spanning 4,860 meters across the Pa Sak River. It serves as a critical multi-purpose project for irrigation, flood control, and hydroelectric power generation. The dam created a large reservoir that serves as a focal point for regional tourism and local recreation. Visitors can traverse the top of the dam by walking, cycling, or utilizing the available tram services. The facility features a public park and dedicated observation points overlooking the expanse of the reservoir. The construction of this project was part of the Royal Initiative to address water shortages in the central plains. The surrounding area includes landscaped gardens and infrastructure for light tourism activities. It is a functional piece of water management infrastructure that allows public access along the crest.
The center point of the dam crest, which offers a symmetrical view of both the reservoir and the downstream valley.
Bring a hat and sunscreen as there is minimal shade along the top of the dam wall.
Rent a bicycle near the entrance to cover the 4.8-kilometer length more efficiently.
Visit the viewing platform near the spillway for the best vantage point of the water discharge.
Do not attempt to swim in the reservoir, as it is strictly prohibited for safety reasons.
The tourist train service is typically limited to weekends and holidays during the cool season.
Maintain modest attire consistent with local cultural norms; avoid littering near the water or within the dam park areas.
