Altitude ranges between 300 m and 1438 m. There is a 600 m elevation opening through the Nelliampathy hills from Anamalai hills on the northern boundary of the sanctuary at Thoothampara. Major peaks in the sanctuary are Karimala Gopuram (1438 m) in the southern boundary of the sanctuary, Pandaravarai (1290 m) in the north, Kuchimudi, Vengoli Malai (1120 m) in the eastern boundary and Puliyarapadam (1010 m) in the west.