Castor Island is a Island located in Thunder Bay, Ontario and has an elevation of 440 meters.

• Latitude: 48° 36' 12'' North   (decimal: 48.6033333)
• Longitude: 90° 12' 37'' West   (decimal: -90.2102777)
• Topography Feature Category: Island
• Geographical Feature: Island
• Canadian Province/Territory: Ontario
• Elevation: 440 meters
• Location: Thunder Bay
• Atlas of Canada Locator Map: Castor Island
• GPS Coordinate Locator Map: Castor Island Lat/Long