The park encompasses the mountain range also known as Mount Iniaoan located in the landlocked municipality of Nunungan in Lanao del Norte and covers a total area of 3,632.74 hectares (8,976.7 acres) with a buffer zone of 889.04 hectares (2,196.9 acres).

[3] It is a critical watershed area and the largest remaining rainforest in Lanao del Norte.

[4] The park is situated in the barangay of Inayawan in Nunungan, some 115 kilometres (71 mi) southwest from the city of Iligan near the border with the province of Lanao del Sur and some 14 kilometres (8.7 mi) north from Magapu Point and Illana Bay.

It is centered around Mount Iniaoan, a conical mountain which is the highest in the province at an altitude of 5,204 feet (1,586 m).

[6][4]It is centered around Mount Iniaoan, a conical mountain which is the highest in the province at an altitude of 5,204 feet (1,586 m).