Since 1897, Patriots Day in Massachusetts has been celebrated with the running of the world's most-honored road race, the Boston MarathonAA(R). The hilly course challenges runners with well-known landmarks such as "Heartbreak Hill" and the deceptively inviting downhill treks at both the start and finish of the 26.2-mile journey. The Boston Marathon captures the colorful spirit of America's greatest race through more than 200 photographs.