US road races
B.A.A. Boston Half
2027 registration dates
Boston, MA, United States
Not announced yet
Last cycle opened Jul 8, 2026
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2027 key dates
Dates for the 2027 edition haven't been announced yet.
How entry works
General registration opens in July for the November race and fills on a first-come basis; the 2026 field of about 9,000 was full by July 11. Spots remained through the Team Dana-Farber and the Jimmy Fund charity team after general entry closed.
Previous cycle
Train for it
Whether you’re waiting on a draw or already in, these guides cover the training block ahead.
