The Nissequogue River is one of only four major riverine ecosystems on Long Island and represents the island's largest tributary to Long Island Sound. Located on the north shore of Long Island in the Town of Smithtown, Suffolk County, this scenic waterway flows approximately nine miles from its freshwater source at Hauppauge Springs to its mouth on Long Island Sound at Smithtown Bay. The river has been officially designated by New York State as a Scenic and Recreational River to encourage preservation and restoration of its natural qualities. With diverse habitats including freshwater springs, tidal wetlands, intertidal mudflats, and salt marshes, the Nissequogue offers excellent fishing opportunities ranging from coldwater trout fishing in its upper reaches to saltwater angling for striped bass and other species in its lower tidal sections.