Lac Chefna is a Lake located in Lac-Nilgaut; Pontiac, Quebec and has an elevation of 366 meters.

• Latitude: 47° 2' 21'' North   (decimal: 47.0391667)
• Longitude: 77° 13' 12'' West   (decimal: -77.22)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 366 meters
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac Chefna
• GPS Coordinate Locator Map: Lac Chefna Lat/Long