Lac Long is a Lake located in Saint-Thomas-Didyme; Maria-Chapdelaine, Quebec and has an elevation of 208 meters.

• Latitude: 48° 55' 30'' North   (decimal: 48.9250158)
• Longitude: 72° 40' 29'' West   (decimal: -72.6747473)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 208 meters
• Location: Saint-Thomas-Didyme; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac Long
• GPS Coordinate Locator Map: Lac Long Lat/Long