Specifically, marathon racing. She’s even got a blog!
For the uninitiated, a bio of Ms. Switzer.
And on a tangentially related note, this thread just popped up on LetsRun.com. Switzer’s mentioned (I think — her name is badly mangled). Other highlights include a mention of the famously awful 1964 Olympic Trials on the Yonkers Marathon course, which is colorfully rendered in the bio of Buddy Edelen. And Patti (Catalano) Dillon makes a surprise appearance.