It covers an area of 186.5 km2 of the districts Seka and Bung Khla.

The wildlife preserve covers forested hills along the Mekong River, ranging between 160 and 448 m elevation.

The highest hill is Phu Wua Lang Tham Sung.

Wildlife of the sanctuary includes elephants, tigers, leopards, bears, pheasants, monkeys, and gibbons.

It took till 1974 for the forestry department to complete the survey and report the results to the government.