Boundary Lake is a Lake located in Thunder Bay; Rainy River, Ontario and has an elevation of 477 meters.

• Latitude: 48° 44' 4'' North   (decimal: 48.7344444)
• Longitude: 90° 57' 48'' West   (decimal: -90.9633333)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 477 meters
• Location: Thunder Bay; Rainy River
• Atlas of Canada Locator Map: Boundary Lake
• GPS Coordinate Locator Map: Boundary Lake Lat/Long