Lac Armstrong is a Lake located in Lac-Pythonga; La Vallée-de-la-Gatineau, Quebec and has an elevation of 285 meters.

• Latitude: 46° 51' 15'' North   (decimal: 46.8542277)
• Longitude: 76° 12' 48'' West   (decimal: -76.2132828)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 285 meters
• Location: Lac-Pythonga; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac Armstrong
• GPS Coordinate Locator Map: Lac Armstrong Lat/Long