Grand lac des Roches is a Lake located in Saguenay; Saguenay, Quebec.

• Latitude: 48° 15' 18'' North   (decimal: 48.255)
• Longitude: 70° 53' 32'' West   (decimal: -70.8922222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Saguenay; Saguenay
• GPS Coordinate Locator Map: Grand lac des Roches Lat/Long