BOSTON — Kenya’s Geoffrey Mutai won the Boston Marathon in 2 hours, 3 minutes, 2 seconds — the fastest anyone has ever run the 26.2 mile distance.

The previous best of 2:03:59 was by Haile Gebrselassie in Berlin 2008. But because Monday’s race had a strong tailwind on a downhill course, Mutai’s run is not recognized by track’s international governing body as a record.

But Mutai was almost three minutes better than the course record set just last year by Robert Kiprono Cheruiyot.

Caroline Kilel won the women’s race to complete the Kenyan sweep, outsprinting American Desiree Davila to win by two seconds, in 2:22:36.