Lac des Grand'Haches is a Lake located in Lac-Walker; Sept-Rivières, Quebec.

• Latitude: 50° 17' 41'' North   (decimal: 50.2947222)
• Longitude: 67° 1' 50'' West   (decimal: -67.0305556)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Walker; Sept-Rivières
• Atlas of Canada Locator Map: Lac des Grand'Haches
• GPS Coordinate Locator Map: Lac des Grand'Haches Lat/Long