Eagle Rock Reservation is a 408.33-acre forest reserve and recreational park in the First Watchung Mountain of New Jersey, located in the communities of West Orange, Montclair, and Verona. The land is owned and administered by the Essex County Department of Parks, Recreation and Cultural Affairs. The reservation is named after the Eagle Rock, a bare rock looking down from the mountain, which marks the boundary between the towns of Montclair and West Orange, New Jersey.