From the Long Island Expressway:

Take EXIT 62 (C.R. 97, or Nicolls Road) NORTH until it ends at 25A in Stony Brook. Turn LEFT onto 25A and proceed approximately 1.5 miles to Main Street. Immediately before the stoplight, bear RIGHT onto Main Street. One block ahead on the LEFT is Harbor Road. Parking is available along Main Street, on Harbor Road, and in the village shopping center just past the park on Main Street. The park's boardwalk entrance is on Harbor Road.

Trail maps are available in the kiosk at the Harbor Road entrance.