The Adirondack Park is the designation for a large area of northeastern New York centered on the Adirondack Mountains. Like Catskill Park to the south, the area is unusual in the United States because, while the entire area is considered "parkland", about 52 percent of the land within the boundary consists of privately owned inholdings. The remaining 48 percent is publicly owned by the state as part of the Forest Preserve. Use of public and private lands in the park is regulated by the Adirondack Park Agency.
The park was established in 1892 for "the free use of all the people for their health and pleasure", and for watershed protection. At 6.1 million acres (25,000 km), it is the largest park in the contiguous United States.