The rivière de l'Ours, also known as Bear River, is a tributary of the Gulf of St. Lawrence, flowing in the municipality of L'Île-d'Anticosti, in the Minganie Regional County Municipality, in the administrative region of Côte-Nord, in the province of Quebec, in Canada.

Forestry is the main economic activity in this area; recreational tourism, second.

[1] The Bear River takes its source from a very small lake (altitude: 175 m (574 ft)) located in the center of Anticosti Island.

This source is located at: From its source, the Bear River flows over 15.9 km (9.9 mi) with a drop of 174 m (571 ft), entirely in the forest area in the SÉPAQ area, according to following segments: The Bear River flows into the bottom of Bear Bay on the north shore of Anticosti Island.

This bay penetrates the land to the south on 1.6 km (0.99 mi).