Lac Guy is a Lake located in Lac-Vacher; Caniapiscau, Quebec and has an elevation of 549 meters.

• Latitude: 54° 59' 15'' North   (decimal: 54.9875)
• Longitude: 67° 9' 40'' West   (decimal: -67.1611111)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 549 meters
• Location: Lac-Vacher; Caniapiscau
• Atlas of Canada Locator Map: Lac Guy
• GPS Coordinate Locator Map: Lac Guy Lat/Long