The river Moyar that flows along the border or Tamil Nadu and Karnataka separates the two. The Mysore – Ooty highway runs through the park. The 321 sq. km. reserve is situated in Tamil Nadu.
Mudumalali wildlife reserve was the first sanctuary in south India. The terrain is extremely varied with hills, valleys, ravines, watercourses and swamps. The vegetation comprises of tropical moist deciduous forests, dry deciduous forests and scrub forests. Compared to the nearby reserves, the climate is warmer in Mudumalai.
Langur, bonnet macaque, tiger, leopard, wild dog, hyena, jackal, sloth bear, elephants, gaur, sambar, spotted deer, Indian muntjac, mouse deer, wild boar, rodent and flying squirrel are part of the wildlife in Mudumalai. It has a rich bird life that includes Malabar trogan, Grey hornbill, crested hawk eagle, crested serpent eagle, etc.
Langur, bonnet macaque, tiger, leopard, wild dog, hyena, jackal, sloth bear, The best time to visit the reserve is from February to June. The sanctuary can be reached by road. The nearest railway station is Udakamandalam. The nearest airport is Coimbatore