The Charles River Reservation is a 17-mile (27 km)-long Massachusetts state park located along the banks of the Charles River in Boston, Cambridge, Watertown, and Newton. The park is managed by the Department of Conservation and Recreation ("DCR"). The portion of the Reservation between the Charles River Dam and the Eliot Bridge is a Historic District. The portions of the Charles River above the Watertown Dam are managed as the Upper Charles River Reservation. Features of the park include the Charles River Dam, the Charles River Basin and Esplanade, and John F. Kennedy Park, a small memorial park to the late president.