Lost Bay is a Bay located in Rainy River, Ontario and has an elevation of 353 meters.

• Latitude: 48° 47' 47'' North   (decimal: 48.7963888)
• Longitude: 93° 32' 7'' West   (decimal: -93.5352777)
• Topography Feature Category: Bay
• Geographical Feature: Bay
• Canadian Province/Territory: Ontario
• Elevation: 353 meters
• Location: Rainy River
• Atlas of Canada Locator Map: Lost Bay
• GPS Coordinate Locator Map: Lost Bay Lat/Long