Lac Big Moose is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec.

• Latitude: 48° 21' 58'' North   (decimal: 48.3661383)
• Longitude: 70° 14' 16'' West   (decimal: -70.2378408)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Big Moose
• GPS Coordinate Locator Map: Lac Big Moose Lat/Long