Marais de Beauharnois Sud-Ouest is a Low vegetation located in Salaberry-de-Valleyfield; Beauharnois-Salaberry, Quebec.

• Latitude: 45° 16' 11'' North   (decimal: 45.2697222)
• Longitude: 73° 57' 39'' West   (decimal: -73.9608333)
• Topography Feature Category: Low vegetation
• Geographical Feature: Marais
• Canadian Province/Territory: Quebec
• Location: Salaberry-de-Valleyfield; Beauharnois-Salaberry
• Atlas of Canada Locator Map: Marais de Beauharnois Sud-Ouest
• GPS Coordinate Locator Map: Marais de Beauharnois Sud-Ouest Lat/Long