The Rivière Pierre (English: Pierre River) is a tributary of Brébeuf Lake, flowing in the municipality of Ferland-et-Boilleau and ivière-Éternité, in the Fjord-du-Saguenay, in the administrative region of Saguenay-Lac-Saint-Jean, in the province of Quebec, in Canada.

The lower part of the Pierre river valley is integrated into the zec du Lac-Brébeuf.

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

The surface of the Pierre 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.

This source is located at: From its source, the course of the Pierre river descends on 15.2 km (9.4 mi) according to the following segments: The Pierre River flows on the south bank of Anse à Taschereau in the eastern part of Lac Brébeuf.