56:51: Yomif Kejelcha Takes Back the Half Marathon World Record

I spend a lot of time thinking about 13.1 miles. Apparently, Yomif Kejelcha (YOH-mif keh-JEL-chuh) needed less than 57 minutes to cover them.

The eye-popping 56:51 jumped out at me because Race Across is built around this exact distance. I'm trying to run a half marathon in all 50 states + D.C. — 51 finish lines, 13.1 miles at a time.

Kejelcha ran that blistering 56:51 on Sunday, Aug. 23, in Buenos Aires, averaging roughly 4:20 per mile for the entire half marathon. What an animal.

World Athletics reports that Kejelcha accelerated substantially in the second half, reaching 10K in 27:19, 15K in 40:41 and 20K in 54:04 before closing the final kilometer in 2:32.

And this wasn't Kejelcha's first time holding the record.

Taking the record back

Here's the sequence:

Kejelcha — 57:30, Valencia 2024

↓

Kiplimo — 56:42, Barcelona 2025 — not ratifiable (!)

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Kiplimo — 57:20, Lisbon 2026

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Kejelcha — 56:51, Buenos Aires 2026

World Athletics says Jacob Kiplimo's ridiculous 56:42 in Barcelona couldn't be ratified as a world record because the race conditions weren't fully compliant with its rules.

Kiplimo later ran 57:20 in Lisbon in March 2026, taking the recognized record from Kejelcha. Now Kejelcha has taken it back, cutting 29 seconds from that mark with his 56:51 in Buenos Aires, subject to the usual ratification procedure.

So yes, Kiplimo has technically run the distance faster. But Kejelcha's 56:51 is the new world-record performance.

2026 is getting ridiculous

And this is where the story gets even crazier. Kejelcha's performance isn't happening in isolation.

Marathon — 1:59:30

Sabastian Sawe, London, April 26. The first man to officially break the two-hour barrier in a record-eligible marathon.

And a nod here to one of my running role models, Eliud Kipchoge. He was the first human to break two hours, running 1:59:40.2 in the specially engineered INEOS 1:59 Challenge in Vienna back in 2019. The setup meant it couldn't count as an official world record, but the achievement was historic nonetheless. Seven years before Sawe made sub-2 official, Kipchoge showed that a human could do it.

In his words: “No human is limited.”

Mile — 3:42.66

Josh Kerr, London, July 18. He broke Hicham El Guerrouj's 27-year-old world record of 3:43.13.

Half marathon — 56:51

Yomif Kejelcha, Buenos Aires, August 23.

Mile. Half marathon. Marathon.

All three world records falling in 2026.

And Kejelcha himself was part of two of them. He finished second behind Sawe in that historic London Marathon, running 1:59:41 in his marathon debut.

Then, four months later, he ran a half-marathon world record.

Ridiculous.

What does 56:51 actually feel like?

Elite performances redefine how I think about a familiar distance — whether it's the mile or, now, the half marathon.

Having put shoes to pavement across those distances and plenty in between, I don't experience the numbers as abstractions. There's performance and optimization involved, sure, but there's also physical pain. Sustaining a fast pace hurts. Training just teaches you to handle more of it.

My fastest mile ever: 4:38.

It hurt my lungs. It hurt my legs. It hurt a lot — in the words of Johnny Cash, haha. And there's a mental battle layered on top of the physical one: your body is hurting, your mind knows it, and it keeps telling you to slow down or hit that stop button. Part of running an all-out mile is convincing yourself not to listen.

Kejelcha's average pace for an entire half marathon: ~4:20/mile.

About 18 seconds per mile faster than my fastest mile — for 13.1 miles. That's absurd.

Repeating anything remotely close to my all-out mile effort 13+ times seems almost inhuman. Godlike, in a sense.

I've also run enough half marathons that 13.1 isn't abstract to me anymore. I know what different paces feel like, where a half starts hurting, and just how long the distance actually is.

My first half was around 1:37, roughly 7:30-per-mile pace. Over time, I've whittled that down through sub-7:00 pace and eventually toward 6:00 — seconds at a time, race after race.

And then there's 4:20.

56:51 isn't just a fast half marathon. It's 13.1 consecutive miles at a pace most accomplished runners couldn't hold for one mile.

Anyway, that's the perspective of someone chasing half marathons around the country.

I'd say racing across the states, but apparently somebody already took that Instagram handle. So I'd be screwed.

Race Across it is, boys and girls.

And no, I'm not running 4:20 pace.

Not even for one split.