Boston 5K Summer Series - Race 1
Cambridge, Massachusetts, United States
Jul 17, 2026 - Friday
5k, Fundraiser
Race Information
This 5k series takes place on eight Thursday evenings from April through September for fun, friendly, chip-timed 5K runs to kick cancer’s butt.
All races are held at the American Legion Marsh Post #442 in Cambridge, MA, and run on paths along the Charles River. Each event will include a post-race party at the Marsh Post with beer generously provided by Mighty Squirrel. 100% of the event proceeds go to charity, including a portion to the American Legion Marsh Post. RACE Cancer Foundation’s Boston 5K Summer Series also provides funding for the Sunscreen Squad, bringing free sunscreen to outdoor events across Massachusetts.
Related Events
Race Cancer Foundation Dennis Port 5K/10k
Date: May 25, 2026 - Monday
Size: 100 - 500 participants
Location: Dennis, Massachusetts
Boston 5K Summer Series - Race 1
Date: Jul 17, 2026 - Friday
Size: 100 - 500 participants
Location: Cambridge, Massachusetts
Boston 5K Summer Series - Race 2
Date: Aug 7, 2026 - Friday
Size: 100 - 500 participants
Location: Cambridge, Massachusetts
Boston 5K Summer Series - Race 3
Date: Sep 4, 2026 - Friday
Size: 100 - 500 participants
Location: Cambridge, Massachusetts
Boston 5K Summer Series - Race 4
Date: Sep 24, 2026 - Thursday
Size: 100 - 500 participants
Location: Cambridge, Massachusetts
Oktoberfest Road Race
Date: Sep, 2026 (TBD)
Size: 500 - 1,000 participants
Location: Waltham, Massachusetts
👍 Run Pick of the Month: Road of Rainbows
📍 Boston, MA - June 6, 2026
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😄 Why We Like This Run
✅ Flat, flexible loop course perfect for all paces
✅ All participants receive a rainbow medal
✅ Post-race free concert
Celebrate Pride at Road of Rainbows, a high-energy 5K on Boston Common where self-expression takes center stage and costumes compete for a $1,500 “Best Dressed” prize. Whether you run, walk, or strut, this inclusive event blends fitness, community, and a vibrant post-race concert into one unforgettable day.
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Race Facts
Race Size: 100 - 500
Course Type: Road
Boston Qualifier: No
Kids Run: No
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