Grand lac Roy is a Lake located in Chute-des-Passes; Maria-Chapdelaine, Quebec and has an elevation of 205 meters.

• Latitude: 49° 2' 48'' North   (decimal: 49.0466667)
• Longitude: 72° 3' 12'' West   (decimal: -72.0533333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 205 meters
• Location: Chute-des-Passes; Maria-Chapdelaine
• Atlas of Canada Locator Map: Grand lac Roy
• GPS Coordinate Locator Map: Grand lac Roy Lat/Long