Port Mahon Boat Ramp offers a state-maintained launch facility on the Mahon River and Kellys Ditch within a 340-acre access area featuring salt marshes, tidal creeks, and beaches.

The site includes a fishing pier (accessible via a short rocky hike and steps, positioned nearly 10 feet above water even at high tide) and an observation platform for wildlife viewing. A pier net is required for fishing from the pier.