The Loutre River is a tributary of the northwest shore of the St. Lawrence River, flowing into the town of La Malbaie, between the towns of Cap-à-l'Aigle and Saint-Fidèle, in the Charlevoix-Est Regional County Municipality, in the administrative region of Capitale-Nationale, in Quebec, in Canada.

The course of this river flows into the St. Lawrence in the hamlet of Bas-de-l'Anse, northeast of the town of La Malbaie.

which runs along the northwest shore of the St. Lawrence River and by route Sainte-Mathilde East.

From the mouth of this head lake, the course of the Loutre River descends by traveling 5.8 km (3.6 mi) according to the following segments: The origin of the name "rivière à la Loutre" is related to the presence of otters in this area.

The toponym "rivière à la Loutre" was formalized on December 5, 1968 at the Bank of place names of the Commission de toponymie du Quebec.