2021 - Cambridge Half Marathon + 5K
2021 distances
Running
Cambridge Half Marathon
Participants have three hours net time to complete the race.
Guide Registration
Participants have three hours net time to complete the race.
Food For Free - Charity Registration
Solutions at Work, Inc - Charity Registration
All In Energy - Charity Registration
ECho - Charity Registration
Stride for Stride Foundation - Charity Registration
Cambridge Camping - Charity Registration
Cambridge Nonprofit Coalition - Charity Registration
Agassiz Baldwin Community - Charity Registration
Just-A-Start Corporation - Charity Registration
Margaret Fuller Neighborhood House - Charity Registration
Transition House - Charity Registration
Cambridge Volunteer Clearinghouse - Charity Registration
YWCA Cambridge - Charity Registration
Charles River Conservancy - Charity Registration
Cambridge Women's Center - Charity Registration
CitySprouts - Charity Registration
Cambridge School Volunteers - Charity Registration
East End House - Charity Registration
Homeless Empowerment Project - Charity Registration
Cambridge Math Circle - Charity Registrations
Race date Weather
Conditions on November 7, 2021 — historical Open-Meteo data.
About Cambridge
Cambridge Half Marathon + 5K takes place in Cambridge, Massachusetts, United States. The local timezone is America/New_York.
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🏃 Plan Your Next Race in Cambridge
Find upcoming events by distance:
- Cambridge 5K Races Best Cambridge routes for beginners and speed work.
- Cambridge Half Marathons Top-rated 21.1K courses in the Cambridge area.
- Cambridge Running Calendar 2026 See all upcoming race dates.
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.