Lac de l'Arrachis is a Lake located in Rivière-Mistassini; Maria-Chapdelaine, Quebec.

• Latitude: 49° 31' 28'' North   (decimal: 49.5245014)
• Longitude: 72° 44' 27'' West   (decimal: -72.7409347)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rivière-Mistassini; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac de l'Arrachis
• GPS Coordinate Locator Map: Lac de l'Arrachis Lat/Long