4K Trail Run
About this race
The 4K Trail Run is the most unique race in Boston! Taking place on Cathleen Stone Island in the Boston Harbor, teams and individual runners will enjoy an afternoon and evening with their coworkers and friends. After a short ferry ride (~30 minutes) to the island, the event will kick off with a 4K race around the island and end with dinner, beer, and an on-island party.
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. The 4K Trail Run is an excellent way to invest in education of Boston youth and is our most popular corporate fundraising event. This year’s 4K Trail Run will take place on Wednesday, May 20th, and Thursday, May 21st, 2026 (Teams and runners must select one day to participate).
Join fellow runners on May 22, 2024 for the 4K Trail Run. It's a fantastic 4K featuring a flat and fast course in Boston.
Pick your distance
Running
Wednesday 4K Trail Run
Wednesday 4K Trail Run - Team Registrations
Each runner receives chip-timed entry, round-trip ferry transportation, a race t-shirt, dinner and beer!
Thursday 4K Trail Run - Team Registrations
Each runner receives chip-timed entry, round-trip ferry transportation, a race t-shirt, dinner and beer!
Thursday 4K Trail Run
Weather Overview
These values reflect historical conditions on the race dates in Boston in 2024, from Open-Meteo archive data.
About Boston
4K Trail Run takes place in Boston, Massachusetts, United States. The local timezone is America/New_York.
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Race information has been sourced from the event's official website and other publicly available resources. For the most up-to-date details, please refer to the official website directly. If you notice any incorrect or missing information, don't hesitate to reach out to us by email.
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