Considered as the last forest bastion and critical watershed area located in the Province of Lanao del Norte, Mindanao, Philippines. It is the only primary remaining and largest rainforest dominated by Dipterocarp species and containing high diversity of flora and fauna in the province. The natural park is a primary source of water supply not just to the immediate communities surrounding it but also for irrigation and potable water to Kapatagan Valley, the rice granary of Lanao del Norte.