Ruisseau Castonguay is a River located in Lac-Casault; La Matapédia, Quebec and has an elevation of 287 meters.

• Latitude: 48° 26' 38'' North   (decimal: 48.4439358)
• Longitude: 67° 10' 29'' West   (decimal: -67.1747047)
• Topography Feature Category: River
• Geographical Feature: Ruisseau
• Canadian Province/Territory: Quebec
• Elevation: 287 meters
• Location: Lac-Casault; La Matapédia
• Atlas of Canada Locator Map: Ruisseau Castonguay
• GPS Coordinate Locator Map: Ruisseau Castonguay Lat/Long