Ruisseau Castonguay is a River located in Saint-Alexandre-de-Kamouraska; Kamouraska, Quebec and has an elevation of 102 meters.

• Latitude: 47° 40' 25'' North   (decimal: 47.6736323)
• Longitude: 69° 38' 56'' West   (decimal: -69.6489389)
• Topography Feature Category: River
• Geographical Feature: Ruisseau
• Canadian Province/Territory: Quebec
• Elevation: 102 meters
• Location: Saint-Alexandre-de-Kamouraska; Kamouraska
• Atlas of Canada Locator Map: Ruisseau Castonguay
• GPS Coordinate Locator Map: Ruisseau Castonguay Lat/Long