PHOTOS: 2019 Boston Marathon

The elite women line up at the starting line in Hopkinton. (WBZ-TV)

2019 Boston Marathon

The elite men take off from the starting line in Hopkinton. (WBZ-TV)

2019 Boston Marathon

Low clouds lie over the start line in Hopkinton as runners prepare to run the marathon. (WBZ-TV)

2019 Boston Marathon

There were runners as far as the eye could see at the start line in Hopkinton. (WBZ-TV)

2019 Boston Marathon

The marathon is underway for tens of thousands of runners (WBZ-TV)

2019 Boston Marathon

Daniel Romanchuk becomes the first American man to win the men's wheelchair race since 1993. (WBZ-TV)

2019 Boston Marathon

Daniel Romanchuk of Urbana, Illinois won the men’s wheelchair division of the Boston Marathon Monday. (WBZ-TV)

2019 Boston Marathon

Manuela Schar celebrates as she approached the finish line to win the women's wheelchair race. (WBZ-TV)

2019 Boston Marathon

Manuela Schar holds her trophy after winning the women's wheelchair race for the second time (WBZ-TV)

2019 Boston Marathon

With half of the marathon left, Worknesh Degefa has created distance between herself and the rest of the elite women (WBZ-TV)

2019 Boston Marathon

2018 Women's champion Des Linden appears in the elite pack trailing Worknesh Degefa around Mile 18. (WBZ-TV)

2019 Boston Marathon

Worknesh Degefa is about three minutes ahead of the pack headed into the last few miles of the marathon (WBZ-TV)

2019 Boston Marathon

There is no one in sight behind women's lead Worknesh Degefa as she approaches Mile 24 (WBZ-TV)

2019 Boston Marathon

Worknesh Degafa of Ethiopia wins the Boston Marathon women's race with an official time of 2:23:30 (WBZ-TV)

2019 Boston Marathon

Ethopian Worknesh Degefa, celebrates winning the Women's Elite race at the 123rd Boston Marathon on April 15, 2019 in Boston, Massachusetts. (Photo by RYAN MCBRIDE / AFP/Getty Images)

2019 Boston Marathon

2018 Boston Marathon champion waves and blows kisses to the crowd as she takes fifth place. (WBZ-TV)

2019 Boston Marathon

Lawrence Cherono and Lelisa Desisa were neck and neck seconds before they reached the finish line. (WBZ-TV)

2019 Boston Marathon

Lawrence Cherono barely beats out Lelisa Desisa for his second Boston Marathon men's race win. (WBZ-TV)

2019 Boston Marathon

Worknesh Degefa celebrates with her trophy in hand following the playing of the Ethiopian national anthem. (WBZ-TV)

cheronotrophy

Lawrence Cherono holds his trophy after winning the men's race with a 2:07:57 time. (WBZ-TV)

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2019 Boston Marathon champions Worknesh Degefa and Lawrence Cherono. (WBZ-TV)

2019 Boston Marathon

Runners looked strong as they passed through Wellesley, (WBZ-TV)

2019 Boston Marathon

A man crawls across the finish line. (WBZ-TV)

2019 Boston Marathon

NASCAR driver Jimmie Johnson crosses the Boston Marathon finish. line. (WBZ-TV)

2019 Boston Marathon

An exhausted runner is carried across the finish line by two other men. (WBZ-TV)

2019 Boston Marathon

Runners headed into Kenmore Square are greeted by the crowd. (WBZ-TV)