Petit lac du Castor is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec and has an elevation of 228 meters.

• Latitude: 49° 26' 28'' North   (decimal: 49.4411111)
• Longitude: 72° 11' 37'' West   (decimal: -72.1936111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 228 meters
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Petit lac du Castor
• GPS Coordinate Locator Map: Petit lac du Castor Lat/Long