Saint-Père River is a tributary of the east bank of the Wetetnagami River flowing into Senneterre, in the RCM of La Vallée-de-l'Or Regional County Municipality, in the administrative region of Abitibi-Témiscamingue, in Quebec, in Canada.

The surface of the Saint-Père River is generally frozen from early December to late April.

The Saint-Père River valley is served by the forest road (East-West direction) passing north of Wetetnagami Lake] and another on the South side passing through the Wetetnagami Lake Biodiversity Reserve.

The confluence of the Saint-Père River with the Wetetnagami Lake is located at: At various times in history, this territory has been occupied by the Attikameks, the Algonquin and the Cree.

The toponym "Rivière Saint-Père" was officialized on December 5, 1968, at the Commission de toponymie du Québec, when it was created.