The Chepelare River (Bulgarian: Чепеларска река, Čepelarska reka, also called Čaja, Чая and Asenica, Асеница) is a river in Bulgaria that takes its source from Rozhen Peak (around 1,500 m above sea level) in the Rhodopes. The river's length is about 87 km and two hydroelectric plants are constructed on it, with a total maximum power of 2,400 kW.