Eliud Kipchoge, undisputed king of the event, finished only 6th in Massachusetts on Monday. Evans Chebet, winner of last year's prestigious New York Marathon, achieved the first double since 2008.
Kenyan middle-distance specialist Hellen Obiri, world champion in the 5000m in London in 2017 and Doha in 2019, won in 2:21:38. The race also marked ten years since the bombing that killed three people and injured nearly 300 near the finish line.