64 Km away west of Ooty, situated at the base of the Nilgiri hills, it is separated from Karnataa’s Bandipur National Park by the Moyar river, it provides one of the elephant and the bison in India. The lowest point of the sanctuary is at the picturesque Moyar Waterfalls, The Mudumalai National Park and Wildlife Sanctuary also a declared tiger reserve, lies on the northwestern side of the Nilgiri Hills (Blue Mountains), in Nilgiri District, about 150 kilometres (93 mi) north-west of Coimbatore city in Tamil Nadu. It shares its boundaries with the states of Karnataka and Kerala. The sanctuary is divided into five ranges – Masinagudi, Thepakadu, Mudumalai, Kargudi and Nellakota. The protected area is home to several endangered and vulnerable species including Indian elephant, Bengal tiger, gaur and Indian leopard. There are at least 266 species of birds in the sanctuary, including critically endangered Indian white-rumped vulture and long-billed vulture.The Western Ghats Nilgiri Sub-Cluster of 6,000 square kilometres (2,300 sq mi), including all of Mudumalai National Park, is under consideration by the UNESCO World Heritage Committee for selection as a World Heritage Site
The sanctuary has an area of 321 Sq. KM with 108 sq.KM of National Park area.
It lies within 11o 30’ N to 11o 42’ N and 76o 30’ E to 76o 45’ E.
Rainfall ranges from 800 – 2000mm. Temperature varies from 14o C to 33o C.
Altitude ranges from 100’ MSL to 1200 MSL.