Lac Fern is a Lake located in Lac-Pythonga; La Vallée-de-la-Gatineau, Quebec.

• Latitude: 46° 31' 53'' North   (decimal: 46.5313889)
• Longitude: 76° 20' 23'' West   (decimal: -76.3397222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Lac-Pythonga; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac Fern
• GPS Coordinate Locator Map: Lac Fern Lat/Long