Boston Athletic Association. BOSTON MARATHON PRINCIPAL SPONSOR Through the B.A.A. s commitment, nearly , Boston area youth have .Boston marathon. Monday, Patriots Day in the Commonwealth of Massachusetts. Boston. The marathon that all other marathons are measured .The Boston Marathon is an annual marathon race hosted by several cities in greater Boston in eastern Massachusetts, United States. It is always held on .During the annual Boston Marathon on , two homemade pressure cookers detonated seconds and yards m apart at p.m., .Boston Marathon Rated . based on Reviews “On the registration process it states If registration does not fill during the first week, then .The Boston Marathon is unlike other marathons, which is part of its appeal. You can t just sign up whenever you wish. Most runners need a .The latest previews, videos, and news of the Boston Marathon..