Lac à Poirier is a Lake located in Grenville-sur-la-Rouge; Argenteuil, Quebec and has an elevation of 197 meters.

• Latitude: 45° 41' 15'' North   (decimal: 45.6874999)
• Longitude: 74° 47' 11'' West   (decimal: -74.7863888)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 197 meters
• Location: Grenville-sur-la-Rouge; Argenteuil
• Atlas of Canada Locator Map: Lac à Poirier
• GPS Coordinate Locator Map: Lac à Poirier Lat/Long