"No dame ever ran the Boston Marathon", Arnie Briggs told Switzer when she was a 19-year-old journalism student that transferred to Syracuse from Lynchburg College in the mid-1960s.
"People say, 'Why stop?"
The winners' times are considered a world best and not a world record.
Kiplagat finished in 2:21:52 to win her Boston debut, adding the victory to two world championships and wins in London, New York and Los Angeles. With the names of the bombing victims written on his bib and chants of "U-S-A!" coming from the crowd, he claimed the first American title since 1985.
Women's victor Edna Kiplagat crossed the finish line at the 2017 Boston Marathon in Nike. He's got a chance to become the first American-born champion in the race since Greg Meyer did it in 1983. "When Americans break the tape, it's going to be a big deal here".
Last month: Victory in Jacksonville.
They were followed closely by Americans who grabbed two of the top four women's spots and six of the top ten for men - the first time that's happened since the race went professional in 1986. "Who would have imagined, 50 years later and still toeing the line!"
Joining Hayle in the field this year are fellow Ethiopians Yemane Tsegay and Dino Sefir.
American Galen Rupp, also in Nike, came in second in the men's competition - only 21 seconds behind Kirui, for a personal record of 2:09:58. "And it was one that made me bound and determined to change things for women", she said.
Today, at 70 years old, Switzer is running with the same bib number she wore 50 years ago, No. 261, and when she crosses the finish line, the Boston Marathon will retire it in recognition of her contribution to women's sports. "And there's no place better to do it than Boston".
There's no shortage of inspiring athletes participating in the 121st Boston Marathon on Monday.
American Jordan Hasay, making her first run at the 26.2-mile distance, was third and Desi Linden was fourth - the first time since 1991 that two US women have finished in the top four.
To search for individual finishers, visit the marathon's results page. Spokeswoman Julia Hadlock said Guiding Eyes is the only center in the country that trains dogs for running, along with their other functions.