St. Mary Lake is a Lake located in Thunder Bay, Ontario and has an elevation of 456 meters.

• Latitude: 49° 46' 31'' North   (decimal: 49.7752777)
• Longitude: 90° 38' 26'' West   (decimal: -90.6405555)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 456 meters
• Location: Thunder Bay
• Atlas of Canada Locator Map: St. Mary Lake
• GPS Coordinate Locator Map: St. Mary Lake Lat/Long