Lac Antostagan is a Lake located in Lac-Pythonga; La Vallée-de-la-Gatineau, Quebec and has an elevation of 368 meters.

• Latitude: 46° 57' 35'' North   (decimal: 46.9597222)
• Longitude: 76° 38' 23'' West   (decimal: -76.6397222)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 368 meters
• Location: Lac-Pythonga; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac Antostagan
• GPS Coordinate Locator Map: Lac Antostagan Lat/Long