Threemile Narrows is a Channel located in Thunder Bay, Ontario and has an elevation of 331 meters.

• Latitude: 49° 10' 50'' North   (decimal: 49.1805555)
• Longitude: 87° 3' 43'' West   (decimal: -87.0619444)
• Topography Feature Category: Channel
• Geographical Feature: Narrows
• Canadian Province/Territory: Ontario
• Elevation: 331 meters
• Location: Thunder Bay
• Atlas of Canada Locator Map: Threemile Narrows
• GPS Coordinate Locator Map: Threemile Narrows Lat/Long