Lac Guay is a Lake located in La Tuque; Le Haut-Saint-Maurice, Quebec.

• Latitude: 47° 18' 43'' North   (decimal: 47.3119742)
• Longitude: 72° 21' 37'' West   (decimal: -72.3603771)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: La Tuque; Le Haut-Saint-Maurice
• Atlas of Canada Locator Map: Lac Guay
• GPS Coordinate Locator Map: Lac Guay Lat/Long