Lac Long is a Lake located in Saint-Alexis-des-Monts; Maskinongé, Quebec.

• Latitude: 46° 47' 59'' North   (decimal: 46.7997570)
• Longitude: 73° 25' 55'' West   (decimal: -73.4320786)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Saint-Alexis-des-Monts; Maskinongé
• GPS Coordinate Locator Map: Lac Long Lat/Long