Lac Castor is a Lake located in Saint-Maxime-du-Mont-Louis; La Haute-Gaspésie, Quebec and has an elevation of 302 meters.

• Latitude: 49° 11' 52'' North   (decimal: 49.1978219)
• Longitude: 65° 33' 5'' West   (decimal: -65.5513130)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 302 meters
• Location: Saint-Maxime-du-Mont-Louis; La Haute-Gaspésie
• Atlas of Canada Locator Map: Lac Castor
• GPS Coordinate Locator Map: Lac Castor Lat/Long