Lac McDown is a Lake located in Lac-Saguay; Antoine-Labelle, Quebec and has an elevation of 343 meters.

• Latitude: 46° 29' 43'' North   (decimal: 46.4952778)
• Longitude: 75° 14' 4'' West   (decimal: -75.2344444)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 343 meters
• Location: Lac-Saguay; Antoine-Labelle
• Atlas of Canada Locator Map: Lac McDown
• GPS Coordinate Locator Map: Lac McDown Lat/Long