Rivière du Castor is a River located in L'Île-d'Anticosti; Minganie, Quebec.

• Latitude: 49° 48' 24'' North   (decimal: 49.8067346)
• Longitude: 63° 17' 15'' West   (decimal: -63.2876319)
• Topography Feature Category: River
• Geographical Feature: Rivière
• Canadian Province/Territory: Quebec
• Location: L'Île-d'Anticosti; Minganie
• Atlas of Canada Locator Map: Rivière du Castor
• GPS Coordinate Locator Map: Rivière du Castor Lat/Long