Lac Guay is a Lake located in Lac-Ernest; Antoine-Labelle, Quebec and has an elevation of 387 meters.

• Latitude: 46° 18' 36'' North   (decimal: 46.31)
• Longitude: 75° 18' 54'' West   (decimal: -75.315)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 387 meters
• Location: Lac-Ernest; Antoine-Labelle
• Atlas of Canada Locator Map: Lac Guay
• GPS Coordinate Locator Map: Lac Guay Lat/Long