Khao Laem National Park is a park of about 1,500 square kilometers in Western Thailand, located near Myanmar in the northern area of the Tenasserim Hills, Kanchanaburi Province. It is a part of the Western Forest Complex, a system of protected wilderness in the Dawna-Tenasserim Hills area of western Thailand. The park, which is adjacent to the Thungyai Naresuan Wildlife Sanctuary, surrounds the Khao Laem Reservoir, located about 340 km northwest of Bangkok. It is bisected by Road 323.