Lac-Castor is a Unincorporated area located in Rivière-Rouge; Antoine-Labelle, Quebec and has an elevation of 307 meters.

• Latitude: 46° 22' 1'' North   (decimal: 46.3669913)
• Longitude: 74° 52' 48'' West   (decimal: -74.8799090)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Village
• Canadian Province/Territory: Quebec
• Elevation: 307 meters
• Location: Rivière-Rouge; Antoine-Labelle
• Atlas of Canada Locator Map: Lac-Castor
• GPS Coordinate Locator Map: Lac-Castor Lat/Long