The general geography of the national park is the complex mountains of the southern end of the Phi Pan Nam Range, lying along north–south direction, looking like a flank surrounding it, some are rocky mountains and among the high mountains in the western part, there are high cliffs, such as Doi Mae Wang Chang and Doi Mae Mok.

The steep slope of the ranges is an advantage for protecting the forests from being destroyed and occupied by local people.

Si Satchanai National Park is the place of historical located in Thung Saliam district, Sukhothai Province.

The total area is 133,250 rai ~ 213 square kilometres (82 sq mi).

[2] The park consists of rich forest that provide an important watershed for the surrounding agricultural area.