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

• Latitude: 49° 36' 51'' North   (decimal: 49.6141667)
• Longitude: 67° 42' 58'' West   (decimal: -67.7161111)
• Topography Feature Category: River feature
• Geographical Feature: Fosse à saumon
• Canadian Province/Territory: Quebec
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Fosse du Castor
• GPS Coordinate Locator Map: Fosse du Castor Lat/Long