PHOTOS: Boston Marathon 2021

Danica Patrick (L) finishes her first marathon with her sister, Brooke Selman. (WBZ-TV)

Boston Marathon 2021

A group of runners carried a woman towards the finish line after her legs apparently gave out. She was able to cross the finish line on her own minutes later. (WBZ-TV)

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Troy, the grandson of legendary Boston Marathon runner Dick Hoyt, celebrates the completion of his first Boston Marathon (WBZ-TV)

Boston Marathon 2021

David Wade speaks with actor Brian d'Arcy James after he finished the Boston Marathon (WBZ-TV)

Boston Marathon 2021

Two runners embrace after finishing the Boston Marathon (WBZ-TV)

Boston Marathon 2021

Chaz Davis (R) of the United States reacts with his guide as he crosses the finish line to win the T11/T12 division of the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

Boston Marathon 2021

Shalane Flanagan of the United States crosses the finish line during the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Malhotra/Getty Images)

Boston Marathon 2021

David Wade speaks with Princeton native Colin Bennie who finished in seventh place for the Boston Marathon (WBZ-TV)

125th Boston Marathon

BOSTON, MASSACHUSETTS - OCTOBER 11: Benson Kipruto and Diana Kipyogei of Kenya react after winning the men's and women's races of the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

Boston Marathon 2021

Boston Mayor Kim Janey presents Diana Kipyogei of Kenya with a golden wreath after winning the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

Boston Marathon 2021

Benson Kipruto of Kenya poses with the Champion's Trophy after winning the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

Boston Marathon 2021

Diana Kipyokei of Kenya crosses the finish line to win the 125th Boston Marathon on October 11, 2021.

2021 Boston Marathon

At the 125th running of the Boston Marathon, the runners pass by Wellesley College in Wellesley, MA on Oct. 11, 2021. (Photo by Suzanne Kreiter/The Boston Globe via Getty Images)

Boston Marathon 2021

Diana Kipyogei of Kenya pulled ahead around mile 22 and was all alone heading towards the finish of the Boston Marathon Monday. (WBZ-TV)

Boston Marathon 2021

Benson Kipruto of Kenya reacts as he crosses the finish line to win the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

Boston Marathon 2021

The Boston Marathon Mens group crests Heartbreak Hill during the 125th running of the Boston Marathon in Newton, MA on Oct. 11, 2021. (Photo by Erin Clark/The Boston Globe via Getty Images)

Boston Marathon 2021

The pack caught CJ Albertston on Heartbreak Hill after he led for more than the first half of the Boston Marathon. (WBZ-TV)

Boston Marathon 2021

Marcel Hug speaks with WBZ-TV's David Wade after winning the Boston Marathon Men's Wheelchair Race (WBZ-TV)

Boston Marathon 2021

Marcel Hug and Manuela Schar of Switzerland pose with the Champion's Trophy after winning the men's and women's wheelchair races during the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

Boston Marathon 20221

Manuela Schar of Switzerland poses with the Champion's Trophy after winning the women's wheelchair race during the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

Boston Marathon 2021

Marcel Hug of Switzerland poses after winning the men's wheelchair race during the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Meyer/Getty Images)

Boston Marathon 2021

Manuela Schar of Switzerland crosses the finish line to win the women's wheelchair race during the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Malhotra/Getty Images)

Boston Marathon 2021

Manuela Schar smiles as she is about to win the Boston Marathon Women's Wheelchair Race (WBZ-TV)

Boston Marathon 2021

Marcel Hug of Switzerland crosses the finish line to win the men's wheelchair race during the 125th Boston Marathon on October 11, 2021 in Boston, Massachusetts. (Photo by Maddie Malhotra/Getty Images)

Boston Marathon 2021

CJ Albertson opened up a huge lead in the first few miles of the Boston Marathon Monday. (WBZ-TV)

Boston Marathon 2021

Manuela Schär of Switzerland jumped out to a huge lead in the first mile of the women's wheelchair race at the Boston Marathon Monday. (WBZ-TV)

Boston Marathon 2021

Marcel Hug of Switzerland jumped out to a huge lead early in the men's wheelchair race at the Boston Marathon Monday. (WBZ-TV)

Boston Marathon 2021

Runner Jake Shoemaker at the start of the 125th running of the Boston Marathon in Hopkinton, MA on October 11, 2021. (Photo by Craig F. Walker/The Boston Globe via Getty Images)

Boston Marathon 2021

The start of the 125th Boston Marathon in Hopkinton, MA on Oct. 11, 2021. (Photo by David L. Ryan/The Boston Globe via Getty Images)

Boston Marathon 2021

Women elite runners at the start of the 125th Boston Marathon in Hopkinton, MA on Oct. 11, 2021. (Photo by David L. Ryan/The Boston Globe via Getty Images)

Boston Marathon 2021

Women's wheelchair start at the start of the 125th Boston Marathon in Hopkinton, MA on Oct. 11, 2021. (Photo by David L. Ryan/The Boston Globe via Getty Images)

Boston Marathon 2021

Men's wheelchair start for the 125th Boston Marathon in Hopkinton, MA on Oct. 11, 2021. (Photo by David L. Ryan/The Boston Globe via Getty Images)

Boston Marathon 2021

Bill Murphy finishes the Boston Marathon virtually for the Make-A-Wish Foundation (WBZ-TV)

Boston Marathon 2021

Ainsley Pauley poses at the Boston Marathon finish line after finishing the race virtually. (Photo Via B.A.A.)

Boston Marathon 2021

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Angela Goodrich, Joy Goodrich, and Christine Karch celebrate a virtual Boston Marathon finish (Photo Via. B.A.A.)

Boston Marathon 2021

Angelo Fulco approaches a makeshift finish line as he completes the Boston Marathon virtually (Photo Via B.A.A.)