Upper Duffy Lake is a Lake located in Algoma, Ontario and has an elevation of 420 meters.

• Latitude: 48° 33' 29'' North   (decimal: 48.5580555)
• Longitude: 84° 58' 57'' West   (decimal: -84.9824999)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 420 meters
• Location: Algoma
• Atlas of Canada Locator Map: Upper Duffy Lake
• GPS Coordinate Locator Map: Upper Duffy Lake Lat/Long