The 2025 Boston Half presented by Dana-Farber Cancer Institute and the Jimmy Fund will take place on Sunday, November 9, 2025. Registration will open on Monday, July 7th, 2025.

Registration through Dana-Farber's charity team will be available. Join Dana-Farber's contact list to find out more information about running for charity. 

• Race Date - Sunday, November 9, 2025 at 8:00 a.m.
• General registration opens July 7, 2025 within the B.A.A.'s online platform Athletes' Village on a first-come, first-serve basis.
• Field size limit is 9,000 entrants
• Registration fee for the 2025 Boston Half is $100.00 USD
• All athletes will receive an adidas Boston Half participant shirt plus race day amenities and unicorn finisher medal.
• Entries are non-transferrable, non-deferrable, and non-refundable
• Entrants must be 14 years old on race day to participate in the Boston Half

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Add meaning to your miles with Dana-Farber and the Jimmy Fund!

Dana-Farber Cancer Institute has partnered with the B.A.A. Half Marathon since 2003 as the race’s presenting sponsor and exclusive charity team. Through this relationship, Dana-Farber runners have collectively raised more than $10 million to support groundbreaking cancer research, and enabled Dana-Farber scientists and clinicians to positively impact the lives of cancer patients around the world. Runners interested in fundraising for Dana-Farber can learn more by clicking below.