John Heinz Wildlife Refuge Access provides free entry to over 10 miles of trails through Pennsylvania's largest freshwater tidal marsh, with parking available at two locations (Lindbergh Boulevard and Route 420).

The refuge offers a visitor center (open Wednesday-Sunday, 9am-4pm), free binoculars and fishing rod loans, and access to the 4.

5-mile tidal segment of Darby Creek for canoeing/kayaking (navigable within 2 hours before and after high tide; visitors must provide their own watercraft and life vests). Trails are open daily sunrise to sunset year-round at no charge.