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

• Latitude: 48° 50' 8'' North   (decimal: 48.8355556)
• Longitude: 70° 8' 29'' West   (decimal: -70.1413889)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• GPS Coordinate Locator Map: Lac à la Blague Lat/Long