The vegetation is predominantly a mix of dipterocarp forests and the montane forests of the upper slopes.  The bright yellow flowers of the Dillenia suffruticosa, a woody shrub usually found on infertile deforested soil are a common feature here. So too are the Tetrastigma, the wild vine, playing host to the Rafflesia pricie, one of the three parasitic Rafflesia species found on Sabah's mountain ranges.

The forest is home to at at least five species of primates, such as Orang Utan, gibbons and the furry tarsier (Kera Hantu) with its enormous round eyes and fog-like hands and feet.

Here to resides the extremely sociable long-tailed macaques.  Easily identified by their prominent cheek whiskers, they are often spotted obligingly grooming each other and picking out edible insect, in the process! 

Presently, the Crocker Range National Park is not open for public visits.  Therefore, those who intend to visit must obtain written permission from the Director of Sabah Parks.  This also applies to travel agents who are bringing tourist to the said park.