Lac Lost is a Lake located in Rouyn-Noranda; Rouyn-Noranda, Quebec.

• Latitude: 47° 46' 0'' North   (decimal: 47.7667454)
• Longitude: 78° 25' 14'' West   (decimal: -78.4206227)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Rouyn-Noranda; Rouyn-Noranda
• GPS Coordinate Locator Map: Lac Lost Lat/Long