By 1937 official state publications were referring to the park as "Presque Isle State Park", and that same year it led the state park system with 1.4 million visitors. In the 1950s the peninsula was enlarged to accommodate new roads and parking, using of sand dredged from the interior of the peninsula. The resulting basin became the current marina. Other new facilities included three modern bath houses built in 1957. That same year Gull Point (at the eastern end of the peninsula) was named a nature preserve by the state.