Sathyamangalam Tiger Reserve, the Gateway to Eastern Ghats, is a significant ecosystem and a wildlife corridor in the Nilgiri Biosphere Reserve between the Western Ghats and the rest of the Eastern Ghats and a genetic link between the five other protected areas which it adjoins, including the Billigiriranga Swamy Temple Wildlife Sanctuary, Sigur Plateau, Mudumalai National Park, Bandipur National Park and the Cauvery Wildlife Sanctuary. All ranges of the Sathyamangalam and Hasanur Forest Divisions except T.N. Palayam range falls within Sathyamangalam and Thalavadi taluks while T.N. Palayam Range falls both in Sathyamangalam and Gobichettipalayam taluks of Erode District in north western Tamil Nadu.