Lac Tortue is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec.

• Latitude: 48° 42' 27'' North   (decimal: 48.7075)
• Longitude: 70° 37' 53'' West   (decimal: -70.6313889)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Tortue
• GPS Coordinate Locator Map: Lac Tortue Lat/Long