Lac Halahan is a Lake located in Lac-Lenôtre; La Vallée-de-la-Gatineau, Quebec and has an elevation of 425 meters.

• Latitude: 47° 38' 32'' North   (decimal: 47.6422222)
• Longitude: 76° 12' 9'' West   (decimal: -76.2025)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 425 meters
• Location: Lac-Lenôtre; La Vallée-de-la-Gatineau
• Atlas of Canada Locator Map: Lac Halahan
• GPS Coordinate Locator Map: Lac Halahan Lat/Long