The rivière à la Catin is a tributary of the Cami River, flowing in the municipality of L'Anse-Saint-Jean and Rivière-Éternité, in the Fjord-du-Saguenay, in the administrative region of Saguenay–Lac-Saint-Jean, in the province from Quebec, to Canada.

The lower part is served by Chemin du Lac Brébeuf.

[2] Forestry is the main economic activity in the sector; recreational tourism, second.

The surface of the Catin River is usually frozen from the beginning of December to the end of March, however the safe circulation on the ice is generally made from mid-December to mid-March.

The toponym "Rivière à la Catin" was formalized on December 5, 1968, by the Commission de toponymie du Québec.