Lost Bay is a Bay located in Rainy River, Ontario and has an elevation of 408 meters.

• Latitude: 48° 9' 26'' North   (decimal: 48.1572222)
• Longitude: 91° 30' 21'' West   (decimal: -91.5058333)
• Topography Feature Category: Bay
• Geographical Feature: Bay
• Canadian Province/Territory: Ontario
• Elevation: 408 meters
• Location: Rainy River
• Atlas of Canada Locator Map: Lost Bay
• GPS Coordinate Locator Map: Lost Bay Lat/Long