Lac Mystery is a Lake located in Senneterre; Vallée-de-l'Or, Quebec.

• Latitude: 48° 56' 25'' North   (decimal: 48.9403540)
• Longitude: 75° 57' 21'' West   (decimal: -75.9557538)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Senneterre; Vallée-de-l'Or
• Atlas of Canada Locator Map: Lac Mystery
• GPS Coordinate Locator Map: Lac Mystery Lat/Long