Andrew Frates ran his first Boston Marathon to support his brother, who he named "Boston's Hero".
Rupp, the bronze medalist in the Rio Olympics, will be running Boston for the first time.
Edna Kiplagat of Kenya, who won the New York City and London marathons in 2010, won the Boston Marathon women's title for the first time at age 37, breaking away from the lead pack in the Newton hills and winning in 2:21:53. Show your support of this monumental day by going out on a run or signing up for a local race near you.
With a first, a third, and a second in his first three tries, Rupp's body of work in his young marathon career is tough to match.
Kenyan long-distance runner Edna Kiplagat won the Boston Marathon on Monday.
Kiplagat, a 38-year-old mother of two whose resume includes marathon wins in London, Moscow, New York and Daegu, ran alone for the final miles of the race and finished in 2:21:52, nearly a minute ahead of Bahrain's Rose Chelimo.
"The crowd gets you through, and I'm just delighted to come to that finish line", he said. While clocking in as the victor of the women's race, Kiplagat managed to cross the finish line in just under two hours and 22 minutes. She said she has no intention of making this her last marathon: She hopes to compete in the New York Marathon in the future.
Rose Chelimo of Bahrain finished second and Americans Jordan Hasay and Desiree Linden took third and fourth.
Marcel Hug won the men's push-rim wheelchair division for the third straight year, finishing in 1:18:03, a world record. The two have become close, he said, and he acknowledged that he'll always be linked to the victims because of his emotional 2014 win.
Kathrine Switzer talks with Ben Beach during a media availability at the Copley Plaza Hotel near the Boston Marathon finish line Thursday, April 13, 2017, in Boston.
He previously ran the Boston Marathon and Marine Corps Marathon in Washington, D.C., last year.
Manuela Schar of Switzerland finished in 1 hour, 28 minutes, 17 seconds - shattering the world best by more than five minutes. Good job, Paula.' That kind of helped me get through some of the tough times.
Eduardo said Monday his goal is to "embody the spirit of those we lost and the spirit of the city they loved".