Lac Ernest is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec and has an elevation of 614 meters.

• Latitude: 48° 50' 45'' North   (decimal: 48.8458333)
• Longitude: 70° 7' 0'' West   (decimal: -70.1166667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 614 meters
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Ernest
• GPS Coordinate Locator Map: Lac Ernest Lat/Long