Lac Long is a Lake located in Mulgrave-et-Derry; Papineau, Quebec and has an elevation of 252 meters.

• Latitude: 45° 48' 34'' North   (decimal: 45.8094444)
• Longitude: 75° 13' 49'' West   (decimal: -75.2302777)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 252 meters
• Location: Mulgrave-et-Derry; Papineau
• Atlas of Canada Locator Map: Lac Long
• GPS Coordinate Locator Map: Lac Long Lat/Long