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

• Latitude: 49° 13' 40'' North   (decimal: 49.2278171)
• Longitude: 70° 36' 13'' West   (decimal: -70.6036809)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• GPS Coordinate Locator Map: Lac du Dur-Bec Lat/Long