Lac Hailly is a Lake located in Lac-Pythonga; La Vallée-de-la-Gatineau, Quebec and has an elevation of 390 meters.

• Latitude: 46° 57' 58'' North   (decimal: 46.9661111)
• Longitude: 76° 40' 48'' West   (decimal: -76.68)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 390 meters
• Location: Lac-Pythonga; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac Hailly
• GPS Coordinate Locator Map: Lac Hailly Lat/Long