Callaghan Marsh is a Low vegetation located in Renfrew, Ontario and has an elevation of 354 meters.

• Latitude: 45° 22' 57'' North   (decimal: 45.3825000)
• Longitude: 77° 31' 46'' West   (decimal: -77.5294444)
• Topography Feature Category: Low vegetation
• Geographical Feature: Marsh
• Canadian Province/Territory: Ontario
• Elevation: 354 meters
• Location: Renfrew
• Atlas of Canada Locator Map: Callaghan Marsh
• GPS Coordinate Locator Map: Callaghan Marsh Lat/Long