Barrage-de-Grand-Détour is a Unincorporated area located in Matane; Matane, Quebec.

• Latitude: 48° 49' 0'' North   (decimal: 48.8167094)
• Longitude: 67° 32' 23'' West   (decimal: -67.5397191)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Lieu-dit
• Canadian Province/Territory: Quebec
• Location: Matane; Matane
• Atlas of Canada Locator Map: Barrage-de-Grand-Détour
• GPS Coordinate Locator Map: Barrage-de-Grand-Détour Lat/Long