baa half marathon Enter 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, AND WE ARE DEEPLY INDEBTED TO THEM FOR THEIR COMMITMENT AND SUPPORT. Registration Volunteer registration for the B.A.A. Half Marathon is expected to open this summer. Descriptions Learn about our B.A.A. Half Marathon volunteer opportunities. To see a full list of potential job descriptions, click here.