Lac à Ernest is a Lake located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec and has an elevation of 451 meters.

• Latitude: 48° 21' 43'' North   (decimal: 48.3619444)
• Longitude: 72° 39' 1'' West   (decimal: -72.6502778)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 451 meters
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Lac à Ernest
• GPS Coordinate Locator Map: Lac à Ernest Lat/Long