Qualifying standards were introduced. The official B.A.A. entry form stated, “A runner must submit the certification...that he has trained sufficiently to finish the course in less than four hours…”
1972 - Women Official Entrants in Marathon
Although Bobbi Gibb was the first woman to complete the Boston Marathon in 1966, it was not until the 1972 Boston Marathon that women could become official entrants due to a change in AAU rules.