Lac McKay is a Lake located in Grenville-sur-la-Rouge; Argenteuil, Quebec and has an elevation of 148 meters.

• Latitude: 45° 39' 50'' North   (decimal: 45.6638888)
• Longitude: 74° 37' 32'' West   (decimal: -74.6255555)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 148 meters
• Location: Grenville-sur-la-Rouge; Argenteuil
• Atlas of Canada Locator Map: Lac McKay
• GPS Coordinate Locator Map: Lac McKay Lat/Long