Kathrine Switzer, first female marathon runner

It seems that it's not just female novelists who have to get on by using initials to hide their gender. I've just seen on Upworthy the story of Kathrine Switzer, the first woman to enter the Boston Marathon, in 1967, who managed to do so by filling in the application form using her initials, K Z. She says that people thought women were unable to compete in the Marathon, and that if they tried they would grow moustaches, get big legs, and their uteruses would fall out.
The Boston Marathon had been going since 1897, inspired by the first modern day one in the 1896 Olympics, it's the oldest yearly one and had had no women for it's first 70 years. When one of the organisers, Jock Semple,  spotted Kathrine in its ranks, he tried to stop her and remove her numbers in full view of the press; luckily she had her trainer and boyfriend with her, and they managed to fend him off. It was another five years before women were allowed officially, in 1972.
 http://www.upworthy.com/think-we-haven-t-come-a-long-way-watch-how-ridiculous-men-were-just-40-years-ago?c=ufb1

 It's now one of six major world marathons, New York began in 1970, London in 1981. Last year the London Marathon was the world's largest.