Lac Rosario is a Lake located in Mont-Valin; Le Fjord-du-Saguenay, Quebec and has an elevation of 813 meters.

• Latitude: 48° 35' 37'' North   (decimal: 48.5936111)
• Longitude: 70° 37' 32'' West   (decimal: -70.6255556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 813 meters
• Location: Mont-Valin; Le Fjord-du-Saguenay
• Atlas of Canada Locator Map: Lac Rosario
• GPS Coordinate Locator Map: Lac Rosario Lat/Long