Lac Guay is a Lake located in Baie-Sainte-Catherine; Charlevoix-Est, Quebec and has an elevation of 183 meters.

• Latitude: 48° 4' 16'' North   (decimal: 48.0711319)
• Longitude: 69° 49' 33'' West   (decimal: -69.8258902)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 183 meters
• Location: Baie-Sainte-Catherine; Charlevoix-Est
• Atlas of Canada Locator Map: Lac Guay
• GPS Coordinate Locator Map: Lac Guay Lat/Long