Lac Castor is a Lake located in Sagard; Charlevoix-Est, Quebec.

• Latitude: 48° 4' 1'' North   (decimal: 48.0669693)
• Longitude: 70° 10' 45'' West   (decimal: -70.1792329)
• Topography Feature Category: Lake
• Geographical Feature: Lac
• Canadian Province/Territory: Quebec
• Location: Sagard; Charlevoix-Est
• GPS Coordinate Locator Map: Lac Castor Lat/Long