Rivière Sylvestre is a River located in Mont-Valin; Le Fjord-du-Saguenay, Quebec.

• Latitude: 51° 46' 8'' North   (decimal: 51.7689747)
• Longitude: 71° 16' 59'' West   (decimal: -71.2831354)
• Topography Feature Category: River
• Geographical Feature: Rivière
• Canadian Province/Territory: Quebec
• Location: Mont-Valin; Le Fjord-du-Saguenay
• GPS Coordinate Locator Map: Rivière Sylvestre Lat/Long