Ugandan Jacob Kiplimo set a men's half-marathon word record on Sunday and also became the first runner to go under 57 minutes.

The half marathon world record now begins with a 56. Jacob Kiplimo of Uganda took a whopping 48 seconds off the previous record Sunday morning at the 2025 Barcelona Half Marathon, clocking 56:42 to become the first man to ever break 57 minutes.

Uganda’s Jacob Kiplimo has broken the half marathon world record in 56 minutes 41 seconds in Barcelona, taking 49 seconds off the previous mark set by Ethiopia’s Yomif Kejelcha in October. Two-time world cross country champion Kiplimo’s run on Sunday was the greatest single improvement on the men’s half marathon record.

Uganda's Jacob Kiplimo broke the world half marathon record with a time of 56 minutes and 41 seconds in Barcelona on Sunday, 49 seconds faster than the previous mark set by Ethiopia's Yomif Kejelcha in October.

Jacob Kiplimo of Uganda broke the men's half-marathon world record with a time of 56 minutes, 41 seconds in Barcelona, surpassing the previous record by Ethiopian Yomif Kejelcha. This remarkable achievement was aided by perfect weather conditions,

Kiplimo ran with a vengeance in Barcelona on Sunday — beating the previous fastest half marathon time by a whole 48 seconds.

Kiplimo finished the race with a time of 56:42 and smashed the previous world record by 48 seconds, the biggest ever single improvement on the men’s half marathon world record. Prior to Kiplimo’s incredible run, Ethiopian athlete Yomif Kejelcha held the record with a time of 57:30.

Ugandan Jacob Kiplimo sets a men's half-marathon world record and also becomes the first runner to go under 57 minutes.

The 24-year-old Kiplimo set a time of 56 minutes, 41 seconds at a road race in Barcelona, smashing the previous record of 57:30 by Ethiopian runner Yomif Kejelcha.