Blue Mountain Reservation is a 2,000-acre park in the northwest section of Westchester County. If we park at 52 Montrose Station Rd, Cortlandt Manor there is NO charge for parking. There are two sides of Montrose Station Rd and the side where we park is off of Maple Ave, so make sure you take the Maple Ave side otherwise the GPS will take you to the opposite end of the park. This entrance is right next to the horse stable. There are easy trails with lots of streams and ponds.