Grand lac à Muir is a Lake located in Saint-David-de-Falardeau; Le Fjord-du-Saguenay, Quebec.

• Latitude: 48° 40' 54'' North   (decimal: 48.6816667)
• Longitude: 71° 5' 53'' West   (decimal: -71.0980556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Saint-David-de-Falardeau; Le Fjord-du-Saguenay
• GPS Coordinate Locator Map: Grand lac à Muir Lat/Long