Spread over an area of 5 sq km, this tropical semi-evergreen area has cultivated areas and tea estates. This reserved forest pocket, comes under the Digboi division of east Assam, mainly houses five species of primate – capped langur, hoolock gibbon, stump tailed macaque, slow loris and common macaque. Borajan is also an ideal place for bird watching.

The Borajan, Juthli Bari, Kunwari Pathar, Jarkhand and Borajan forest village are the five villages positioned around the sanctuary.