This is the official facebook home for The Boston Marathon. Learn more about us at www.baa.org. Established in 1887, the Boston Athletic Association is a non-profit organization with a mission of promoting a healthy lifestyle through sports, especially running. The B.A.A.’s Boston Marathon is the world's oldest annual marathon, and the organization manages other local events and supports comprehensive charity, youth, and year-round running programs, including high performance athletes and running club. Since 1986, the principal sponsor of the Boston Marathon has been John Hancock Financial. The Boston Marathon is part of the Abbott World Marathon Majors, along with international marathons in Tokyo, London, Berlin, Chicago, and New York City. For more information on the B.A.A., please visit www.baa.org.