Lac du Marathon is a Lake located in Rivière-Kipawa; Témiscamingue, Quebec.

• Latitude: 47° 11' 36'' North   (decimal: 47.1934006)
• Longitude: 78° 41' 8'' West   (decimal: -78.6856331)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Kipawa; Témiscamingue
• Atlas of Canada Locator Map: Lac du Marathon
• GPS Coordinate Locator Map: Lac du Marathon Lat/Long