Grand lac Long is a Lake located in Bonne-Espérance; Basse-Côte-Nord, Quebec and has an elevation of 56 meters.

• Latitude: 51° 28' 24'' North   (decimal: 51.4733860)
• Longitude: 57° 36' 18'' West   (decimal: -57.6049090)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 56 meters
• Location: Bonne-Espérance; Basse-Côte-Nord
• Atlas of Canada Locator Map: Grand lac Long
• GPS Coordinate Locator Map: Grand lac Long Lat/Long