Cathleen Stone Island Unescorted Public Access 2026

Explore the diverse habitats and scenery of the 204 acres of Cathleen Stone Island including meadows, woodlands, salt marsh, and shoreline.

Note: Registration with Cathleen Stone Island Outward Bound School is required to visit Cathleen Stone Island. Round-trip tickets for UPA (Unescorted Public Access) will be available at a discounted rate of $20.00 per person. Children 15 and under visit Cathleen Stone Island for Free.

Please reserve ferry tickets here and refer to the Cathleen Stone Island Outward Bound rules of conduct. Capacity is limited to 40 passengers.

The ferry will depart the EDIC Berth 10 dock in the Seaport at 9:00am. Please arrive at least 15 minutes early. The ferry ride takes 30 minutes. This is a rain or shine event. Please note that some guests may be outside for the duration of the ferry ride.

The ferry will depart the island promptly at 12:30pm. Once again, please arrive early for the departure.

For more information on the conservation area on Cathleen Stone Island :

https://www.nps.gov/boha/learn/management/thompson-restriction.htm