Mudhumalai which means ‘old hills,’ is on the northwest of the Nilgiri. It is an important corridor for various animals, this forest is a continuum of Bandipur and Nagarhole forests in the north, Wayanad Wildlife Sanctuary on the west, forests of Silent Valley in the south, to the east is Sigur plateau that leads to Sathyamangalam forest. It is home for tigers, leopards, elephants, hyenas, bisons, monkeys and various other animals, reptiles, birds and insects.
River Moyar, a tributary of River Bhavani, flows through the forest. The forest is a mix of several vegetation – the tropical moist deciduous, tropical dry deciduous, thorn forest or scrub jungle patches; this variety in flora gives a rich colour to the forest.