Lost River is a Unincorporated area located in Harrington; Argenteuil, Quebec and has an elevation of 257 meters.

• Latitude: 45° 49' 53'' North   (decimal: 45.8314341)
• Longitude: 74° 32' 53'' West   (decimal: -74.5479550)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Village
• Canadian Province/Territory: Quebec
• Elevation: 257 meters
• Location: Harrington; Argenteuil
• Atlas of Canada Locator Map: Lost River
• GPS Coordinate Locator Map: Lost River Lat/Long