The Huancabamba River has its origin in the confluence of the rivers Huaylamayo and Chontabamba in Peru. The upper course is formed by the basins of these rivers. The middle course is between Huancabamba and the Pozuzo and its lower course between Pozuzo and the confluence with the river Palcazú. The river Huancabamba - Pozuzo has a general south - north orientation. The river basin is between the mountain range of Yanachaga to the East and the line departmental limit Huánuco - Pasco. It is interrupted by the Limón Dam.