Boston Athletic Association

The Boston Athletic Association (B.A.A.) is a non-profit dedicated to organized sports, with a focus on running, in the Greater Boston area. The B.A.A. hosts such events as the Boston Marathon, the B.A.A. 5K, the B.A.A. 10K, the B.A.A. Half Marathon, the B.A.A. Distance Medley (comprising the 5k, 10K, and half marathon events), and the B.A.A. Invitational Mile.