[2] Formerly known as Mohansic (State) Park, it is situated in Yorktown, approximately 40 miles (64 km) from New York City.

The land south of Crom Pond and Mohansic Lake was acquired in 1908 for the New York State Training School for Boys.

During the Great Depression, a Civilian Conservation Corps camp was placed in the park, several buildings from which remain today.

[5] Franklin D. Roosevelt State Park prominently features a large swimming pool with the capacity to hold 3,500 bathers at one time.

The park also offers biking, a boat launch and rentals, disc golf, fishing, ice skating, picnic tables and pavilions, a playground and playing fields, recreation programs, trails for hiking, jogging, snowmobiling and cross-country skiing, and a food concession.