Lac Tondreux is a Lake located in Lac-Marguerite; Antoine-Labelle, Quebec.

• Latitude: 47° 6' 44'' North   (decimal: 47.1122222)
• Longitude: 76° 3' 50'' West   (decimal: -76.0638889)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Marguerite; Antoine-Labelle
• Atlas of Canada Locator Map: Lac Tondreux
• GPS Coordinate Locator Map: Lac Tondreux Lat/Long