Lac Sylvain is a Lake located in Rivière-aux-Outardes; Manicouagan, Quebec and has an elevation of 640 meters.

• Latitude: 50° 52' 32'' North   (decimal: 50.8755829)
• Longitude: 68° 52' 57'' West   (decimal: -68.8825237)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 640 meters
• Location: Rivière-aux-Outardes; Manicouagan
• Atlas of Canada Locator Map: Lac Sylvain
• GPS Coordinate Locator Map: Lac Sylvain Lat/Long