Landscape
The reserves consist of almost every kind of forest found in Thailand, including mountain virgin forest, dry virgin forest and pine forest. It has a total area of about 5,775 square kilometres. In addition, it is the watershed of rivers flowing to Srinakharin Dam.
Flora and fauna
The unspoiled nature of the reserve makes it an ideal home to various rare and endangered animals such as wild buffalo, rhinoceros, wild elephant, tapir, leopard, wild bull, etc.