Rivière du Castor is a River located in Rivière-aux-Outardes; Manicouagan, Quebec.

• Latitude: 50° 3' 7'' North   (decimal: 50.0519444)
• Longitude: 69° 50' 14'' West   (decimal: -69.8372222)
• Topography Feature Category: River
• Geographical Feature: Rivière
• Canadian Province/Territory: Quebec
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Rivière du Castor
• GPS Coordinate Locator Map: Rivière du Castor Lat/Long