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

• Latitude: 48° 33' North   (decimal: 48.5499999)
• Longitude: 70° 15' West   (decimal: -70.2500000)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac du Grand Ruisseau
• GPS Coordinate Locator Map: Lac du Grand Ruisseau Lat/Long