The Rivière du Sault au Mouton flows south, on the north shore of the St. Lawrence River, in the unorganized territory of Lac-au-Brochet and the municipality of Longue-Rive, in the La Haute-Côte-Nord Regional County Municipality in the administrative region of Côte-Nord, in the province of Quebec, in Canada. It flows into the estuary of Saint Lawrence at Longue-Rive. The lower part of the hydrographic slope of the "Sault au Mouton river" is served by the route 138 which crosses it near its mouth. From the village of Sault-au-Mouton, this valley is served by a forest path that goes up to Lake Vaillancourt, passing east of Lake Kergus and east of Lake Trente Milles. From this last lake, a secondary forest road goes up the valley to serve the east of Lac de la Petite Montagne. Forestry is the main economic activity in this area; second, recreational tourism activities. The surface of the "Sault au Mouton River" is usually frozen from late November to early April, however safe traffic on the ice generally occurs from mid-December to late March.
Geography
The main neighboring hydrographic slopes of the Sault au Mouton river are:
North side: Éperlan River, Truite River, rivière des Cèdres, Gros Ruisseau, Castors River, Roussel River, Portneuf River ;
The "Sault au Mouton river" takes its source at the mouth of the "Grand-Mère lake" in forest zone, in the unorganized territory of Lac-au-Brochet. From the mouth of "Lac de la Grand-Mère", the course of the "Sault au Mouton river" flows mainly in the forest area over according to the following segments: Upper course of the Sault au Mouton river
towards the south-east, in particular by crossing an unidentified lake ;
towards the South, collecting the discharge of Lake Michel and the discharge of Lake Marcel, to the North shore of "lake of the Little Mountain ";
towards the south, crossing the "lac de la Petite Montagne" over its full length;
towards the east, in particular by crossing the Lac des Trente Milles, up to 'at its mouth;
eastward, cutting a forest road at the end of the segment, to the outlet of lakes Edgar and Ten;
eastward to a bend in the river, corresponding to the confluence of the Roussel River ;
towards the South-East in particular by crossing the Lac des Piliers ;
east to a bend in the river;
north-east in Longue-Rive crossing Lac Thibault to its mouth which corresponds to the northwestern limit of the former municipality of Saint-Paul-du-Nord;
towards the east in the municipality of Longue-Rive winding between mountains, collecting the Truite stream, the Black stream and the Castors River , to a bend in the river, corresponding to the discharge of a stream ;
towards the south-east, passing under the high-voltage lines of Hydro-Québec, to a bend in the river;
to the south more or less parallel to the shore of the estuary of Saint Lawrence, forming two loops to the east, up to a bend in the river;
The Sault au Mouton river flows over a sandstone up to on the west bank of the Saint Lawrence River in the sector Sault-au-Mouton of the municipality of Longue-Rive in the bay of Mille-Vaches which is part of the "Hauts-Fonds de Mille-Vaches". This mouth is located at:
east of the source of the river, ie the mouth of Lac de la Grand-Mère;
