Lac du Talweg is a Lake located in Lac-Pythonga; La Vallée-de-la-Gatineau, Quebec.

• Latitude: 46° 14' 45'' North   (decimal: 46.2458333)
• Longitude: 76° 29' 44'' West   (decimal: -76.4955555)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Pythonga; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac du Talweg
• GPS Coordinate Locator Map: Lac du Talweg Lat/Long