Khlong Wang Chao National Park is situated in the Thanon Thong Chai Mountain Range.
Most of the area consists of complicated mountains lying along the North and South. They are one part of Thanon Thong Chai Mountain Range and there is a plain area in their middle part which looks like two pan basins covering 3.2–8 km2 (1.2–3.1 sq mi). The important mountain ranges are Yen, Tao Dam, Tat Rup Khai, Mi, Bang Cha Le Mountains, Bang Sung Peak etc. Yen mountain located in the western park is the highest peak at about 1,898 metres (6,227 ft) above sea level, while the height of this area is about 300–2,000 metres (980–6,560 ft) above sea level.
On December 7, 1988, the Minister of Agriculture and Cooperative and parties have surveyed the condition of conservation, forest Khlong Wang Chao and Khlong Suan Mak Forests. They found the fertile and densely teak forest (Tectona grandis) and other features. They would like to conserve the forest, thus, Khlong Wang Chao National Park was gazetted on August 29, 1990 with an area of 466,875 rai ~ 747 square kilometres (288 sq mi)[2] as the 63rd park of Thailand.