Tarn Lake is a Lake located in Nipissing, Ontario and has an elevation of 285 meters.

• Latitude: 45° 47' 56'' North   (decimal: 45.7988888)
• Longitude: 77° 42' 5'' West   (decimal: -77.7013888)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 285 meters
• Location: Nipissing
• Atlas of Canada Locator Map: Tarn Lake
• GPS Coordinate Locator Map: Tarn Lake Lat/Long