Rivière du Grand Portage Sud-Ouest is a River located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec and has an elevation of 592 meters.

• Latitude: 48° 52' 6'' North   (decimal: 48.8683823)
• Longitude: 73° 29' 0'' West   (decimal: -73.4834262)
• Topography Feature Category: River
• Geographical Feature: Rivière
• Canadian Province/Territory: Quebec
• Elevation: 592 meters
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Rivière du Grand Portage Sud-Ouest
• GPS Coordinate Locator Map: Rivière du Grand Portage Sud-Ouest Lat/Long