The Chikokon Range is part of the Khentei-Daur Highlands, South Siberian System. It rises in the interfluve of the Chikoy River, a right tributary of the Selenga, and some tributaries of the Onon River. The southern part of the ridge acts as watershed between the Arctic and Pacific oceans. The relief is characterized by steep slopes. Traces of Pleistocene glaciation in the form of sediments are present in certain places of the range.