Lac du Bac is a Lake located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec and has an elevation of 425 meters.

• Latitude: 49° 33' 17'' North   (decimal: 49.5547222)
• Longitude: 73° 59' 45'' West   (decimal: -73.9958333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 425 meters
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac du Bac
• GPS Coordinate Locator Map: Lac du Bac Lat/Long