Lac Duchesne is a Lake located in Lac-Nilgaut; Pontiac, Quebec and has an elevation of 337 meters.

• Latitude: 46° 27' 58'' North   (decimal: 46.4661715)
• Longitude: 77° 43' 45'' West   (decimal: -77.7291950)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 337 meters
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac Duchesne
• GPS Coordinate Locator Map: Lac Duchesne Lat/Long