The Boston Athletic Association (B.A.A.) today announced that registration for the 15th B.A.A. Half Marathon, presented by Dana-Farber Cancer Institute and the Jimmy Fund, closed after its 8,500 entrant field size limit was reached. The B.A.A. Half Marathon will be held on Sunday, October 11, 2015, and will be the third and final race in the 2015 B.A.A. Distance Medley. Registration opened on Wednesday, July 15 at 10:00 a.m. ET, and closed at 5:00 p.m. ET, on Thursday, July 16.