Grand lac Eileen is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec.

• Latitude: 48° 58' 28'' North   (decimal: 48.9744444)
• Longitude: 71° 12' 25'' West   (decimal: -71.2069444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Grand lac Eileen
• GPS Coordinate Locator Map: Grand lac Eileen Lat/Long