Cat Tien, in the north of Dong Nai Province borders on Lam Dong Province at the Dong Nai riverhead is a primitive forest with an area of 35,000 hectare. Located at the end of Truong Son mountain, the Cat Tien forest has a lot of hills and between hills are fertile valleys. Cat Tien forest is 100 km from Bien Hoa Province. It is protected as a national park.