Lac Roy is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec and has an elevation of 258 meters.

• Latitude: 49° 28' 3'' North   (decimal: 49.4675)
• Longitude: 72° 12' 6'' West   (decimal: -72.2016667)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 258 meters
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac Roy
• GPS Coordinate Locator Map: Lac Roy Lat/Long