The park landscape is generally dominated by mountainous terrain. Phu Thap Boek, also known as Phu Man Khao, the highest mountain of the Phetchabun Range, is located within the park area.[2] The northern part of the park stretches to the border with Laos. The southern part of the park extends into the Phetchabun Province. Mountain peaks include Phu Phang Ma, Phu Lom Lo and Phu Hin Rong Kla. The second tallest is Phu Lomlo at an elevation of 1,664 meters. Within the park are the sources of the Mueat Don and Luang Yai Rivers.