This pass is the watershed between the Llobregat and Segre basins. On the eastern slope, the torrent of Les Molleres flows down, which goes, through the Saldes area, towards the Llobregat. The Cerneres River flows along the western slope of the pass, which drains into the Josa River, and further down the Vansa, a tributary of the Segre. The view from the pass is privileged, especially over the Pollegó Superior del Pedraforca.