Mont Castor is a recreation center located in Saint-Gabriel-de-Valcartier, Quebec, Canada. It offers a variety of activities including cross-country skiing, golf, mountain biking, and more. The center has 95 km of cross-country skiing trails, 19 slopes, and a snow park. Visitors can also enjoy equipment rentals, a restaurant, and a bar. The center is open to the public and is situated at the foot of Mont Brillant on the Valcartier military base.