Mayhew Lake is a Lake located in Rainy River, Ontario and has an elevation of 460 meters.

• Latitude: 48° 55' 11'' North   (decimal: 48.9197222)
• Longitude: 91° 3' 20'' West   (decimal: -91.0555555)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 460 meters
• Location: Rainy River
• Atlas of Canada Locator Map: Mayhew Lake
• GPS Coordinate Locator Map: Mayhew Lake Lat/Long