B.A.A. Half Marathon Participants Results Volunteer Watch Dana-Farber Sponsors Registration Sections volunteer at the b.a.a. half marathon volunteer at the b.a.a. half marathon B.A.A. VOLUNTEERS TAKE PRIDE IN THEIR ROLE WITHIN OUR RACES AND WE ARE GRATEFUL FOR THEIR COMMITMENT AND SUPPORT. Registration Volunteer registration for the B.A.A. Half Marathon is open. Apply online today! Descriptions Learn about our B.A.A. Half Marathon volunteer opportunities. To see a full list of potential job descriptions, click here.