Elevation varies from to above MSL, the highest point being Kallathigiri on the eastern boundary. The sanctuary is surrounded by the scenic hills and steep slopes of the Mullayanagiri, Hebbegiri, Gangegiri and Bababudangiri hills. Mullayanagiri peak in the Baba Budan Giri Range near the southeast edge of the sanctuary is the highest peak between the Himalayas and the Nilgiris.