Rivière Desmarais is a River located in Entrelacs; Matawinie, Quebec.

• Latitude: 46° 7' 23'' North   (decimal: 46.1230956)
• Longitude: 74° 1' 10'' West   (decimal: -74.0193213)
• Topography Feature Category: River
• Geographical Feature: Ruisseau
• Canadian Province/Territory: Quebec
• Location: Entrelacs; Matawinie
• Atlas of Canada Locator Map: Rivière Desmarais
• GPS Coordinate Locator Map: Rivière Desmarais Lat/Long