Brennan Lake is a Lake located in Renfrew, Ontario and has an elevation of 129 meters.

• Latitude: 45° 54' 19'' North   (decimal: 45.9052777)
• Longitude: 77° 18' 39'' West   (decimal: -77.3108333)
• Topography Feature Category: Lake
• Geographical Feature: Lake
• Canadian Province/Territory: Ontario
• Elevation: 129 meters
• Location: Renfrew
• Atlas of Canada Locator Map: Brennan Lake
• GPS Coordinate Locator Map: Brennan Lake Lat/Long