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

• Latitude: 48° 57' 42'' North   (decimal: 48.9616667)
• Longitude: 70° 44' 59'' West   (decimal: -70.7497222)
• 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 Thon
• GPS Coordinate Locator Map: Lac du Thon Lat/Long