Kimangkil-Kalanawan Mountains, we estimated 70 to 80 thousand hectares of Higaonon rainforest tribal lands situated within the boundaries of Misamis Oriental-Bukidnon-Agusan provinces in north-central Mindanao region. Major river-system such as; Pulangi, Agusan, Gingoog, Odiongan, Cabulig and Tagoloan emanates from its rainforest.