Upper montane forest ranges from 2,300 to 2,900 masl which extends up to Mt. Dulangdulang. Trees in this habitat type are gnarled and have a stunted growth with a more or less uniform height of 10-12 meters (FSDI). Trunks and branches of these trees are festooned with thick mats of mosses, lichens (Usnea spp.) and epiphytic ferns. Oaks, Lithocarpus spp. and Syzigium spp. are particularly abundant.
Forest cover remains largely intact except for a regenerating portion that burned during the 1982-83 drought. Its present area is more or less 2,000 hectares. A large number of endemic and globally threatened species of wildlife have been documented in this habitat including 11 species of birds, four species of mammals and one species of butterfly.