Lac Castor à Queue is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec.

• Latitude: 50° 17' 29'' North   (decimal: 50.2914527)
• Longitude: 70° 16' 26'' West   (decimal: -70.2740122)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Castor à Queue
• GPS Coordinate Locator Map: Lac Castor à Queue Lat/Long