La Grande Mare is a Lake located in Saint-Sulpice; L'Assomption, Quebec.

• Latitude: 45° 48' 7'' North   (decimal: 45.8019846)
• Longitude: 73° 21' 1'' West   (decimal: -73.3504153)
• Topography Feature Category: Lake
• Geographical Feature: Mare
• Canadian Province/Territory: Quebec
• Location: Saint-Sulpice; L'Assomption
• Atlas of Canada Locator Map: La Grande Mare
• GPS Coordinate Locator Map: La Grande Mare Lat/Long