Banas River is the only river that has its entire course in Rajasthan. It originates in Khamnor hills of Rajsamand district and flows past Bhilwara, Tonk and Sawaimadhopur districts. It finally joins Chambal river near Khandhar (Sawaimadhopur district). It's main tributaries are Berach, Kothari, and Khari. The Banas is a river of Rajasthan state in western India. It is a tributary of the Chambal River, which in turn flows into the Yamuna, a tributary of the Ganges. The Banas is approximately 512 kilometres in length. The Banas originates in the Khamnor Hills of the Aravalli Range, about 5 km from Kumbhalgarh in Rajsamand District. It flows northeast through Mewar region of Rajasthan, meets the Chambal near the village of Rameshwar in Sawai Madhopur District. The cities of Nathdwara, Jahanpur, and Tonk lie on the river. The Banas drains a basin of 45,833 km