Lac Guay is a Lake located in Lac-Lenôtre; La Vallée-de-la-Gatineau, Quebec.

• Latitude: 47° 30' 17'' North   (decimal: 47.5047918)
• Longitude: 75° 46' 45'' West   (decimal: -75.7790820)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Lenôtre; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac Guay
• GPS Coordinate Locator Map: Lac Guay Lat/Long