Lac des Illusions is a Lake located in Lac-Pythonga; La Vallée-de-la-Gatineau, Quebec.

• Latitude: 46° 23' 37'' North   (decimal: 46.3936111)
• Longitude: 76° 14' 47'' West   (decimal: -76.2463889)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Pythonga; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac des Illusions
• GPS Coordinate Locator Map: Lac des Illusions Lat/Long