The Saint-Maurice River (French: Rivière Saint-Maurice; Atikamekw: Tapiskwan sipi) flows North to South in central Quebec from Gouin Reservoir to empty into the Saint Lawrence River at Trois-Rivières, in the province of Quebec, in Canada. From its source at Gouin Reservoir, located at the same latitude as the Lac Saint-Jean, the river has a total drop of about 405 meters (1330'), to finally reach the St. Lawrence river at Trois-Rivières. The river is 563 km (350 miles) in length and has a drainage basin of 43,300 km² (16,700 sq.miles). Saint-Maurice river is one of the most important tributaries of the St. Lawrence river.