For the best freshwater fishing on Long Island in 2026, Lake Ronkonkoma stands out as the premier destination. As the island's largest and deepest lake (reaching depths of 65 feet), it support a diverse population of Largemouth and Smallmouth Bass, as well as Chain Pickerel and Walleye. For those seeking a more tranquil experience, Blydenburgh Lake (also known as Stump Pond) in Smithtown is famous for its massive Largemouth Bass and scenic hiking trails. If you are looking for trout, Hempstead Lake State Park and the Carmans River are the top choices, as they are regularly stocked by the NYS Department of Environmental Conservation in the spring and fall. For families, Belmont Lake State Park offers easy shore access and a very high "catch rate" for bluegill and yellow perch. Remember that in 2026, all anglers aged 16 and older still require a valid New York State freshwater fishing license, which can be easily purchased via the official state mobile app.