Spencer Reef is a Shoal located in Muskoka, Ontario and has an elevation of 177 meters.

• Latitude: 45° 0' 9'' North   (decimal: 45.0024999)
• Longitude: 80° 3' 20'' West   (decimal: -80.0555555)
• Topography Feature Category: Shoal
• Geographical Feature: Reef
• Canadian Province/Territory: Ontario
• Elevation: 177 meters
• Location: Muskoka
• Atlas of Canada Locator Map: Spencer Reef
• GPS Coordinate Locator Map: Spencer Reef Lat/Long