Cathleen Stone Island Outward Bound School (formerly Thompson Island), Boston MA
Wednesday, May 20th, 2026
🏃♂️ Race Rescheduling Information
- Original Date: The 4K scheduled for Thursday, May 22nd was postponed due to weather.
- New Date: The event has been rescheduled for Thursday, June 26.
- Additional Spots: There are additional spots available for individual runners and corporate teams.
- Registration Deadline: The new registration deadline is Friday, June 20.
🌅 About the 4K Trail Run
- Unique Experience: The 4K Trail Run is the most unique race in Boston!
- Location: Taking place on Cathleen Stone Island in the Boston Harbor.
- Event Highlights: Enjoy a race through the island followed by dinner, beer, and an on-island party.
- Transportation: After a short ferry ride (~30 minutes) to the island, the event will kick off.
💡 Supporting a Good Cause
- Mission: Every dollar raised from the 4K Trail Run supports Cathleen Stone Island's mission to deliver free, hands-on science learning to Boston's youth.
- Investment: The 4K Trail Run is an excellent way to invest in the education of Boston youth.
- Popularity: This event is our most popular corporate fundraising event.
- Event Dates: This year’s 4K Trail Run will take place on Wednesday, May 21st, and Thursday, May 22nd, 2025.
📅 Register Now
Teams and runners must select one day to participate. For more details, visit the race page: Cathleen Stone Island 4K Trail Run.
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