Lac Dernier is a Lake located in Rivière-Éternité; Le Fjord-du-Saguenay, Quebec and has an elevation of 323 meters.

• Latitude: 48° 19' 40'' North   (decimal: 48.3278068)
• Longitude: 70° 24' 8'' West   (decimal: -70.4022898)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 323 meters
• Location: Rivière-Éternité; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Dernier
• GPS Coordinate Locator Map: Lac Dernier Lat/Long