Lac Portneuf is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec and has an elevation of 471 meters.

• Latitude: 49° 8' 0'' North   (decimal: 49.1333697)
• Longitude: 70° 18' 33'' West   (decimal: -70.3092364)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 471 meters
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Portneuf
• GPS Coordinate Locator Map: Lac Portneuf Lat/Long