Long Lake is a town in Hamilton County, New York in the United States. The town is named for 14-mile (23km) long Long Lake beside which it sits. The town is entirely within the Adirondack Park and is the most northerly town in the county. It is a summer tourism destination offering fishing, hiking, boating, and many other outdoor activities. In the winter months, snowmobiling is also popular. Long Lake is also the home of the historic Adirondack Hotel and Helms Aero Service, floatplane service.