Lac des Grands Midis is a Lake located in Lac-Walker; Sept-Rivières, Quebec.

• Latitude: 50° 14' 18'' North   (decimal: 50.2383736)
• Longitude: 66° 51' 10'' West   (decimal: -66.8526742)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Walker; Sept-Rivières
• Atlas of Canada Locator Map: Lac des Grands Midis
• GPS Coordinate Locator Map: Lac des Grands Midis Lat/Long