Lac de l'Ennui is a Lake located in Lac-Nilgaut; Pontiac, Quebec and has an elevation of 282 meters.

• Latitude: 46° 9' 41'' North   (decimal: 46.1614454)
• Longitude: 76° 50' 34'' West   (decimal: -76.8427719)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 282 meters
• Location: Lac-Nilgaut; Pontiac
• Atlas of Canada Locator Map: Lac de l'Ennui
• GPS Coordinate Locator Map: Lac de l'Ennui Lat/Long