Kolli Hills is a small mountain range located in central Tamil Nadu in Namakkal district of India. The mountains are about 1000 to 1300 meters in height and cover an area of approximately 280 km². The Kolli Hills has 70 hair pin bends to reach the top of the hills. The Kolli Hills are part of the Eastern Ghats, which is a mountain range that runs mostly parallel to the east coast of South India.
The mountains are relatively untouched by commercial tourism and still retain their natural beauty. Under the foot hills of the Kolli Hills there are so many Small and Big Towns existing. From these places the Kolli Hills is visible in a panoramic view and the climatic conditions of these places is influenced by the climatic conditions of the Kolli Hills. Following are the few Towns surrounding the Kolli Hills: --- Namakkal, Sendamangalam, Kalappanaickenpatti, Belukurichi, SingalandaPuram, Rasipuram, Namagiripettai, Thammampatti, Koppampatty, Thuraiyur, Pulianjolai, Thathaiyangarpet and all these places are well connected by frequent bus services.