And finish she did.
The runner who became the first American woman to win the Boston Marathon in 33 years was very close to quitting on Monday. Penwell ran a personal record of 2:55:01, according to the association.
What was more shocking, though, was the runner-up in the women's field Monday.
BC-ATH-Boston Marathon, 641Boston Marathon weather was ideal storm for Desiree LindenAP Photo BX231, BX144, BX133Eds: With AP Photos. Molly Huddle, a 26-time US national champion on the track, was ready to give the marathon distance a real crack. American Tatyana McFadden, won the women's wheelchair race for the fifth time, wore two jackets, with a layer of plastic between them and hand warmers against her chest. "This is Boston. This is the greatest race in the world".
The Boston Marathon has been held since 1987, inspired by the marathon race at the first modern Olympics Games of the previous year, making it the oldest marathon race in the world.
"The rest of me is on cloud nine, so I can't complain too much", she said. She abandoned her plan, skipping water stations - after all, she wouldn't be out long enough to get dehydrated - and wasting energy by allowing her fellow Americans to draft off of her.
She runs most mornings before hitting the hospital floor and was a promising runner when she was at Weber State University.
Before the half marathon mark, Ethiopia's MamituDaska pulled away from the frontrunners and it appeared to be a reality check for Americans.More news: Turkey snap elections set for 24 June
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"It's hard to get down when you look on both sides of the street for the vast majority of the race and there's people yelling the entire time", Sellers grinned. "For me, these are the best conditions possible", he told reporters after the race.
Daska maintained through the first 20 miles before Linden and Kenya's Gladys Chesir caught up.
"If you're a marathoner everyone always asks you, 'have you run Boston?' So in Sarah's case now she can say 'yes, oh and by the way, I was second", Pilkington said. She never turned back.
But a broken bone in her foot saw her hang up her shoes for a full year and by the time she was fine to pound the pavement, her priority was completing medical school. American Sarah Sellers was a distant second in 2:44:04 with Canada's Krista Duchene third, another 16 seconds adrift. She qualified for the U.S. Olympic trials. You obviously don't know her.
She made a decision to run the 2018 Boston Marathon to raise money for the Dana-Farber Cancer Institute.
On Tuesday, she said her legs were dead but the rest of her is soaring.
"I was a little bit in disbelief when I saw her cross the line, I went, 'wait, did they miss somebody? is she really second?'" Pilkington laughed. She's smarter than I am in those things. "I don't think there was a single person in Boston who thought I would win this today".
"That's why we race", Linden said.