B.A.A. Half Marathon Registration Participants Plan Results Volunteer Watch Dana-Farber Sponsors 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. The deadline to apply is September 18. Descriptions Learn about our B.A.A. Half Marathon volunteer opportunities. To see a full list of potential job descriptions, click here.