[2] The park also contains over thirty caves, rock formations and patches of surviving primary and secondary growth dipterocarp forests.

The forests of the Mainit protected area support several old dipterocarp and giant fern species.

[1] Fifty percent of its forest cover is Yemane and Falcata plantations, while shrub species inhabit the rest such as hagimit, binunga, and himlaumo.

[4] In the caves on the slopes flanking the river basin, swiftlets known as sayaw-sayaw, and several small to medium-sized native bats producing guano fertilizers can also be found.

[1] Some of the park's large mammals include the long-tailed macaque, Asian palm civet, Philippine tree squirrel, and Celebes warty pig.