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4K Trail Run

Boston, United States • 20-21 May 2026

Event Details

The 4K Trail Run takes place on Cathleen Stone Island in Boston Harbor. The island is accessed by a ferry ride of approximately 30 minutes.

Distances

  • 4 km trail run

Event Structure

The event is held on two separate days, with options for both individual runners and teams. The run is followed by dinner, beer, and a party on the island.

Purpose

All funds raised from the event support Cathleen Stone Island's mission to provide free, hands-on science learning for youth in Boston. Visit the organization's website for the most recent information.

United States Massachusetts Boston

Race information

Registration
4k Trail Run
Visit the organization's website for the most recent information.
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