Slender Lake is a Lake located in Rainy River, Ontario and has an elevation of 361 meters.

• Latitude: 49° 1' 59'' North   (decimal: 49.0330555)
• Longitude: 93° 41' 56'' West   (decimal: -93.6988888)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 361 meters
• Location: Rainy River
• Atlas of Canada Locator Map: Slender Lake
• GPS Coordinate Locator Map: Slender Lake Lat/Long