Lac Long is a Lake located in Saint-Marc-du-Lac-Long; Témiscouata, Quebec and has an elevation of 207 meters.

• Latitude: 47° 23' 58'' North   (decimal: 47.3994657)
• Longitude: 68° 55' 15'' West   (decimal: -68.9208638)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 207 meters
• Location: Saint-Marc-du-Lac-Long; Témiscouata
• Atlas of Canada Locator Map: Lac Long
• GPS Coordinate Locator Map: Lac Long Lat/Long