[3][4] The protected landscape is an important watershed of several river systems supporting irrigation for the surrounding rice paddies and lowland communities.

It spans six barangays or rural villages in Tigbao namely, New Tuburan, Timolan, Upper Nilo, Maragang, Limas and Guinling, and one each in San Miguel and Guipos municipalities namely, Dumalinao and Datagan, respectively.

[5] The park is characterized by steep slopes and dividing ridges, with rolling to moderately undulating topography.

[5] Lowland forests cover eighty percent (80%) of the landscape with the remaining areas consisting of secondary grassland.

In the open bushland grow cogon grass and other species of family Graminae.