Lac de la Faiblesse is a Lake located in Rivière-aux-Outardes; Manicouagan, Quebec.

• Latitude: 50° 32' 13'' North   (decimal: 50.5370174)
• Longitude: 69° 16' 55'' West   (decimal: -69.2820480)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Lac de la Faiblesse
• GPS Coordinate Locator Map: Lac de la Faiblesse Lat/Long