Lac du Treuil is a Lake located in L'Anse-Saint-Jean; Le Fjord-du-Saguenay, Quebec.

• Latitude: 48° 6' 37'' North   (decimal: 48.1103034)
• Longitude: 70° 12' 25'' West   (decimal: -70.2070111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: L'Anse-Saint-Jean; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac du Treuil
• GPS Coordinate Locator Map: Lac du Treuil Lat/Long