Lac Fortier is a Lake located in Saint-Étienne-des-Grès; Maskinongé, Quebec and has an elevation of 55 meters.

• Latitude: 46° 22' 1'' North   (decimal: 46.3669721)
• Longitude: 72° 44' 32'' West   (decimal: -72.7423417)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 55 meters
• Location: Saint-Étienne-des-Grès; Maskinongé
• Atlas of Canada Locator Map: Lac Fortier
• GPS Coordinate Locator Map: Lac Fortier Lat/Long