Mount Pinbarren lies within the South East Queensland bioregion and the Mary River catchment area.

It was established to preserve significant hoop pine complex microphyll vine forest and habitat for the endangered Coxen’s fig parrot.

[2] Mount Pinbarren National Park contains a small sample of remnant araucarian notophyll vine forest more typical of drier areas further west.

The araucarian notophyll vine forest (ANVF) is unusual in the district, as many of the species are representative of dry rainforest.

Some other species present include Olea Paniculata, Ophioglossum Pendulum, Hodkinsonia Oratifola, Calophaniodes Hyhrophiloides and Tragia Novaehollandiae.