The Berach River, a tributary of the Banas River, is a river of Rajasthan state in western India. The Berach originates in the hills of Udaipur District, northeast of Udaipur city. The river has a length of 157 km, and drains a basin of 7,502 km². It flows northeast through Udaipur, Chittorgarh and Bhilwara districts, joining the Banas near Bigod village of Bhilwara district. The fortress city of Chittorgarh lies on the Berach. Its chief tributaries are the Ahar, Wagli Wagon, Gambhiri and Orai, which join it from the right. The Ayar flows through the city of Udaipur, joining the Berach at the reservoir of Udai Sagar.