Petit lac Castor is a Lake located in Rivière-aux-Outardes; Manicouagan, Quebec.

• Latitude: 49° 51' 4'' North   (decimal: 49.8511609)
• Longitude: 69° 18' 32'' West   (decimal: -69.3090077)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Petit lac Castor
• GPS Coordinate Locator Map: Petit lac Castor Lat/Long