 Several state and county parks are located in Mahwah, including Campgaw Mountain Reservation, Darlington County Park and Ramapo Valley County Reservation, all operated by Bergen County.The Ramapo River runs through the western section of Mahwah.Mahwah is bordered by the municipalities of Allendale, Franklin Lakes, Oakland, Ramsey, Upper Saddle River and Wyckoff in Bergen County; Ringwood in Passaic County; and Airmont, Hillburn, Ramapo and Suffern in Rockland County, New York.