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

• Latitude: 51° 41' 53'' North   (decimal: 51.6980556)
• Longitude: 70° 44' 41'' West   (decimal: -70.7447222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• GPS Coordinate Locator Map: Grand lac Malfait Lat/Long