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

• Latitude: 52° 9' 43'' North   (decimal: 52.1619444)
• Longitude: 70° 58' 23'' West   (decimal: -70.9730556)
• 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 Sourire
• GPS Coordinate Locator Map: Lac du Sourire Lat/Long