Gateway Marina is a full-service marina located in Brooklyn, New York City, and operates within the Gateway National Recreation Area which sees 10 million visitors annually. The marina is situated inside Dead Horse Bay, adjacent to Floyd Bennett Field which is home to the Aviator Sports Complex. The Belt Parkway and Flatbush Avenue intersect near the marina, making it easy to get to by car. It’s also conveniently accessible by subway and bus.

Gateway Marina features 500 slips ranging from 16 feet to 150 feet, 1800 feet of breakwater, and a 35-ton travel-lift. The marina also offers 24-hour security, picnic areas with barbeque grills, and restrooms and shower facilities. Transient dockage is available on a daily, monthly or long-stay basis.

Services offered at Gateway Marina include emergency hauls, hull painting, fiberglass work, interior and exterior detailing, and shrink wrapping. The retail shop offers bait and tackle, snacks, beer, soda, ice, and just about anything else you might need for a perfect day on the water.

Dead Horse Bay is a popular location for sport fishing tours and charters, and over the years has been home to a number of different commercial outfits, from flour mills to fertilizer manufacturers to fish oil production. In the 1920s, much of the salt marsh surrounding Dead Horse Bay and the rest of Barren Island were pumped with sand from Jamaica Bay, which raised the land to 16 feet above the high tide mark. It also connected the islands to each other, and to the mainland of Brooklyn, in order to create Floyd Bennett Field as New York City's first municipal airport. The entire area is now managed by the National Park Service as part of the Jamaica Bay Unit of the Gateway National Recreation Area.