The river is 240 kilometres long, with a tidal estuary going approximately 24 kilometres upriver. Its average discharge is 23 m/s and can reach 1500 m/s during floods. The source of the river is the Middle Atlas mountains at an altitude of 1627 meters on the level of Jbel Mtourzgane (Province of Khemisset) and of Grou (Province of Khénifra).