Lac Castor is a Lake located in Chute-des-Passes; Maria-Chapdelaine, Quebec.

• Latitude: 48° 52' 8'' North   (decimal: 48.8688889)
• Longitude: 71° 44' 9'' West   (decimal: -71.7358333)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Chute-des-Passes; Maria-Chapdelaine
• Atlas of Canada Locator Map: Lac Castor
• GPS Coordinate Locator Map: Lac Castor Lat/Long