2025 Boston Half Registration NOW OPEN!

Registration for the 2025 Boston Half presented by Dana-Farber Cancer Institute and the Jimmy Fund opens today – Monday, July 7th!

Submissions will be accepted on a first-come, first-served basis until the field size limit of 9,000 entrants is reached.

The Boston Half is a family-friendly event for athletes and spectators of all ages. Free youth events will be offered on race morning within Franklin Park, including races and medals for all.

Run with Dana-Farber and the Jimmy Fund to Defy Cancer

Make more meaning with your miles by registering to run the Boston Half Marathon with Dana-Farber Cancer Institute and the Jimmy Fund’s team. Dana-Farber and the Jimmy Fund have been the presenting sponsor of the Boston Half Marathon since 2003 and invite you to train and fundraise with them as they race to defy cancer.

Register for the team today.

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