The Sunken Meadow State Parkway was considered as one part of three spurs of the Sagtikos State Parkway, which bridged the eastern gap of the Long Island parkway system. Then designated the Sunken Meadow Spur, the route was to connect the Northern State and Sagtikos to Sunken Meadow State Park. The Sagtikos State Parkway opened on September 29, 1952 with provisions for the Sunken Meadow State. Originally when the park opened, an entrance was placed on a remote section of NY 25A in Fort Salonga.