Chamonix was supposed to host a coronation this weekend. Instead it hosted a reshuffle.
The 2026 Ultra-Trail du Mont-Blanc was billed by organisers as one of the strongest fields in the race's history: 846 elite entrants across the week from 54 nationalities. By the time the gun finally went on Friday night, two hours late because of thunderstorms forecast over the massif, four former champions had already gone home, the course had been rerouted around the Pyramides Calcaires, and the men's race had lost its two highest-rated entrants inside 24 hours of each other.
What followed was the fastest UTMB ever run, by two athletes almost nobody had circled a month ago.
The double that wasn't
Vincent Bouillard arrived carrying the weight of history. The Frenchman won UTMB in 2024 as an unsponsored surprise, then removed any doubt in June by winning Western States in 13:46:15, a course record that took 23 minutes off Jim Walmsley's 2019 mark and made him the first man under 14 hours in California.
That set up the hardest sequence in modern ultra running: Western States and UTMB in the same summer. Only Kilian Jornet has ever pulled it off, back in 2011.
For a few hours it looked plausible. Bouillard led through Saint-Gervais at 22.9km in 1:54:29, right where you'd want to be. Then, on the long climb to the Col du Bonhomme, he came apart. He slid through the standings, was helped through Les Contamines by his Hoka teammate Walmsley, who was in Chamonix as a spectator rather than a competitor, and stopped at Lac Combal, roughly 68km in, before the race even reached its Italian half.
He hasn't publicly given a reason. French reporting has settled on the most obvious explanation: two months was not enough to recover from what he did at Western States. The double remains, for now, Jornet's alone.
Two knees, no start line
The other headline names never got that far.
Jornet announced on 20 August that he would not run. His left knee had been a problem since spring, an MRI after Zegama showed a horizontal tear of the lateral meniscus, patellar cartilage damage and bone oedema. He had been managing it without surgery, and a long training effort convinced him and his medical team that the conservative approach had failed. He is a four-time UTMB champion chasing a record fifth title, and this makes it four consecutive editions he has missed since his 2022 win.
Walmsley disappeared from the start list the following day. The 2023 champion and course record holder had the highest UTMB Index in the field at 967, ahead of Jornet's 948. He cited a combination of the knee that had already stopped him at Western States in June and illness in the week before the race.
They weren't alone. Defending champion Tom Evans withdrew on 13 August after dropping out of Hardrock in July. Women's course record holder Katie Schide was ruled out by a foot injury. Then, two days before the start, defending women's champion Ruth Croft posted that she wouldn't be running either, writing that her heart and mind wanted to be elsewhere.
Four champions, four completely different reasons, one race that looked nothing like the one everybody had previewed.
Dhiman breaks 19 hours
Ben Dhiman had been quietly telling anyone who asked that he wanted to win this race. The American, who lives in the French Pyrenees, finished second to Evans last year in horrendous conditions and spent the winter attacking his weakest link, adding roughly 30% more climbing than at the same point the previous year.
It showed. He took the lead before 40km and simply never gave it back. Seven minutes up at Les Chapieux (52km), fourteen at Lac Combal, twenty-two by Grand Col Ferret, over half an hour by Vallorcine. He finished in 18:16:29, the first sub-19-hour performance in the race's history.
It isn't an official course record, because the storm-forced reroute shortened the loop. Nobody in Chamonix seemed to care.
Behind him, the fight for second went to a sprint on the Avenue Michel Croz. Baptiste Chassagne, whose stated goal was to break 20 hours, held off a charging Caleb Olson by 46 seconds: 18:47:38 to 18:48:24. Three men under 19 hours on the same day, in a race where nobody had ever done it once. The entire top ten went under 20 hours.
The women's race, and the story of the weekend
With Croft and Schide out, Courtney Dauwalter became the outright favourite. She lasted until Lac Combal, dropping around 4am at almost exactly the point where Bouillard's race ended, thirteen minutes apart on the same stretch of mountain. She has given no reason either.
That left the race to Blandine L'Hirondel, and she took it apart. The Frenchwoman led early, traded the front with Rachel Entrekin through the night, then pulled away decisively after Refuge Bertone. Her margin went from three minutes to fifteen to over forty. She fell hard on the final descent and limped into Chamonix in 21:54:49, the first woman ever under 22 hours here, and a two-and-a-half-hour improvement on either of her two previous finishes.
It also completed a set. L'Hirondel won OCC in 2021 and CCC in 2022; she is now only the second woman, and third person overall, to win all three Chamonix finals, following Xavier Thévenard and Croft. She's the first French winner of the women's race since Caroline Chaverot in 2016.
The podium behind her is arguably the better story. Rachel Entrekin finished second in 22:15:54 on debut, in a season that already included an outright win at the Cocodona 250. And Emily Schmitz, a relative unknown who lives in the Chamonix valley, was 20th at last year's CCC and races in the 45–49 category, came from seventh at Courmayeur to third in 22:17:28. Ninety-four seconds separated the two Americans after 174 kilometres.
None of the three women who stood on last year's podium were in this year's top three. The same was true of the men.
The point
2,407 runners started. Within twelve hours, 177 had stopped, including 21 of the hundred lowest bib numbers, the ones UTMB reserves for its highest-rated athletes. And the weather that night was fine: mild, still, a full moon over the trails.
That's the thing about this sport. You can have the course record, the form, the index rating and the entire preview written in your favour, and the mountain will still ask a question you can't answer. Bouillard couldn't. Dauwalter couldn't. Jornet and Walmsley didn't even get to be asked.
Meanwhile a man who came second last year and a woman who'd been third and fifth ran the two fastest times the race has ever seen.
This sport is is never predictable and that's rather the point.
