Sharon Lokedi set a new Boston Marathon course record, defeating Hellen Obiri by 19 seconds. John Korir won the men's race with the second-fastest time in history, joined by his brother Wesley Korir, making them the first sibling duo to win the marathon. Kenyan runners have dominated both categories in recent years, with Sisay Lemma from Ethiopia breaking the streak in 2024.

Sharon Lokedi set a new course record at the Boston Marathon on Monday, as she outran her fellow Kenyan, Hellen Obiri, in a thrilling final mile. This victory came one year after Lokedi narrowly lost to Obiri in one of the closest finishes in Boston Marathon history, with both women battling down Boylston Street. Lokedi completed the race in an unofficial time of 2 hours, 17 minutes, and 22 seconds, finishing 19 seconds ahead of Obiri. Obiri, who had hoped to make history by becoming the first female runner to win three Boston Marathons since 1999, was unable to achieve her goal. Lokedi's performance also set a new benchmark for the marathon, as she finished more than 2 and a half minutes faster than the previous Boston best.

In the men’s race, John Korir of Kenya, six months after winning the Chicago Marathon, claimed victory with an impressive time of 2:04:45. This was the second-fastest winning time in the history of the Boston Marathon, with the ideal marathon conditions providing perfect weather for the runners to tackle the 26.2-mile course from Hopkinton to Boston’s Copley Square. After crossing the finish line, Korir was warmly greeted by his older brother, Wesley Korir, the 2012 Boston Marathon winner. The Korirs made history by becoming the first brothers to both win the prestigious Boston Marathon, making them the first relatives to achieve such a remarkable feat. While the race has previously been won by unrelated runners like John Kelley and Robert Cheruiyot, the Korir brothers' achievement adds a unique chapter to the marathon's storied legacy.

Since 2021, Kenyan runners have dominated the women’s category at the Boston Marathon, and all winners of the men's race since 2019 have been Kenyan—except for 2024, when Ethiopia’s Sisay Lemma claimed the top spot.