“Women are Unbelievable.” Kathrine Switzer on International Women’s Day.

Kathrine Switzer has done more for women in running than arguably anyone else in our sport. Overcoming a tackle from the Boston Marathon race director in 1967, she became the first woman with a bib to complete that race and led the way not only for women to participate in North America’s most prestigious running event, but also pioneer women’s only races and help get the women’s marathon into the Olympic Games. Today, as the founder of 261 Fearless, which empowers women through running around the world, Switzer, at 77, is as active as ever.