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

• Latitude: 50° 45' 24'' North   (decimal: 50.7567061)
• Longitude: 69° 0' 31'' West   (decimal: -69.0086790)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Lac du Castor
• GPS Coordinate Locator Map: Lac du Castor Lat/Long