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Cambridge Half Marathon + 5K
The Cambridge 5K is the kickoff to race weekend! It's a 3.1-mile course that starts and finishes at CambridgeSide. It's a quick out and back along the Charles River that will have you in awe of the Boston skyline. The Cambridge Half Marathon is a 13.1-mile USATF certified course that starts and finishes at CambridgeSide. It is a fast and flat course along Memorial Drive featuring views of the Charles River, MIT, John W. Weeks Footbridge, Harvard University Stadium, and more.
Available Distances
Awards & Prizes
Earn Cash Back
Get a Refund By Referring Friends Tell your friends, family, and co-workers how excited you are about the 2025 Cambridge Half Marathon + 5K! For every 5 friends that register using your special referral link (included in your confirmation email), you will earn $20 back!
AWARDS
Registration & Pricing
| Distance | Price | Opens | Closes |
|---|---|---|---|
| 13.1 Miles | $100.00 | Dec 30 | Dec 31 |
| $100.00 | Dec 31 | Apr 10 | |
| $110.00 | Apr 11 | Jun 29 | |
| $125.00 | Jun 30 | Aug 14 | |
| $135.00 | Aug 15 | Nov 1 | |
| 5K | $45.00 | Dec 30 | Dec 31 |
| $45.00 | Dec 31 |
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