Petite rivière Trenche Ouest is a River located in Lac-Ashuapmushuan; Le Domaine-du-Roy, Quebec and has an elevation of 489 meters.

• Latitude: 48° 17' 40'' North   (decimal: 48.2944444)
• Longitude: 72° 54' 58'' West   (decimal: -72.9161111)
• Topography Feature Category: River
• Geographical Feature: Rivière
• Canadian Province/Territory: Quebec
• Elevation: 489 meters
• Location: Lac-Ashuapmushuan; Le Domaine-du-Roy
• Atlas of Canada Locator Map: Petite rivière Trenche Ouest
• GPS Coordinate Locator Map: Petite rivière Trenche Ouest Lat/Long