Americans finish on podium at Boston Marathon, pair of Kenyans win

She kept running, becoming a symbol of girl power in sports. She'd registered under the name "K.V. Switzer" not with the intention of becoming a women's pioneer in the sport but to prove to her coach, Syracuse's Arnie Briggs, that women could run 26.2 miles.

That's when Jack Semple, a race official, jumped off the press bus and ran after her.

"Suddenly, it all comes back to life", Switzer said in the video.

The Boston Athletic Association is retiring bib No. 261 in honor of Switzer. Switzer, though, used her initials (described by some at the time as "chicanery") to officially sign up.

A photograph which captured the incident became an iconic turning point for women's running and the feminist movement. A new documentary that premiered in Boston on Saturday night, narrated by Matt Damon, tells that story along with many others from the history of the world's longest running long run. We are here to change the life of women. Although Bobbi Gibb was also in the race for the second straight year, one of the unofficial runners known as bandits, race director Jock Semple fumed at the sight of Switzer in an official bib and tried to pull her off the course.

"My goal is to reach women in places right now where they're not allowed to leave the house alone, drive a vehicle or get an education, " Switzer said last week, according to WBZ.

The club started putting on events, and eventually she got sponsored.

Switzer went to work in PR and helped create the Avon International Running Circuit of 400 women's races that showed the IOC there were enough women to fill out an Olympic field.

"It grew, grew, grew", she explained.

"It keeps happening. We keep getting closer".

Her success has continued through to present day.

Switzer ran the marathon wearing the number 261, the same number male participants had tried to rip off her clothing in 1967. "It's hard to explain in words", he said, "but the feeling when you're running and then even when you're a spectator, listen to this crowd, it's just wonderful". To take the first step. And if you take the first step, you can then take three steps.

The 121st Boston Marathon will see four-time Olympian Meb Keflezighi make his farewell performance.

In total, 99 countries were represented, including one runner from San Marino (a nation barely big enough to run a marathon in).