Lac Castor is a Lake located in Montcalm; Les Laurentides, Quebec and has an elevation of 358 meters.

• Latitude: 45° 57' 37'' North   (decimal: 45.9602778)
• Longitude: 74° 27' 8'' West   (decimal: -74.4522221)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Elevation: 358 meters
• Location: Montcalm; Les Laurentides
• Atlas of Canada Locator Map: Lac Castor
• GPS Coordinate Locator Map: Lac Castor Lat/Long