Petite prairie des Castors is a Lake located in Port-Cartier; Sept-Rivières, Quebec.

• Latitude: 49° 45' 12'' North   (decimal: 49.7533333)
• Longitude: 67° 13' 36'' West   (decimal: -67.2266667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Port-Cartier; Sept-Rivières
• Atlas of Canada Locator Map: Petite prairie des Castors
• GPS Coordinate Locator Map: Petite prairie des Castors Lat/Long