McMahon Lake is a Lake located in Lillooet Land District, British Columbia and has an elevation of 1109 meters.

• Latitude: 51° 21' North   (decimal: 51.3499999)
• Longitude: 121° 12' West   (decimal: -121.1999999)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: British Columbia
• Elevation: 1109 meters
• Location: Lillooet Land District
• Atlas of Canada Locator Map: McMahon Lake
• GPS Coordinate Locator Map: McMahon Lake Lat/Long