The Petite rivière à l'Ours - West (English: "Little Bear River" - West) is a tributary of rivière à l'Ours, flowing in the municipality of Saint-Félicien, in the Le Domaine-du-Roy Regional County Municipality, in the administrative region of Saguenay–Lac-Saint-Jean, in the province of Quebec, in Canada.

The surface of the Little Bear River is usually frozen from the beginning of December to the end of March, except the rapids areas; however, safe traffic on the ice is generally from mid-December to mid-March.

The Little Bear River takes its source from an unidentified small lake (length: 0.3 km (0.19 mi); altitude: 239 m (784 ft)), in the western part of the municipality from Saint-Félicien.

The mouth of this small lake is located at: From the mouth of the head lake, the Little Bear River flows over 13.1 km (8.1 mi) with a drop of 131 m (430 ft) especially in forest areas, depending on the segments following: The Little Bear River flows into a bend on the west bank of the rivière à l'Ours.

The toponym "Little Bear River" was formalized on December 5, 1968, at the Place Names Bank of the Commission de toponymie du Québec.