Aussie Stephanie Auston and Brit Morgan Glazier grab KosciMiler glory in the Snowy Mountains

Australia’s Stephanie Auston and Great Britain’s Morgan Glazier have claimed the 100-mile titles at the 2025 Ultra-Trail Kosciuszko by UTMB, held in the Snowy Mountains of New South Wales.

That was the feature event while in the 100km race, Great Britain’s Sophie Broome and France’s Loris Lassere took the wins.

And in 50km race Canberra’s Michael Dimuantes and Iceland’s Andrea Kolbeinsdottir came out on top.

Here’s how it all played out along with reaction from all the winners…

KosciMiler

It was a sweet victory for Newcastle runner Auston, who had finished runner-up in the past two editions of the KosciMiler.

“It feels good. I’ve had second two years in a row, and I just hadn’t managed to put together a good race but today was much better,” said Auston. “I fell over a bit, but that’s my own fault. It was good, I knew the weather was going to set in, so I wanted to finish under 20 hours, and I did so I’m really happy.”

Auston established an early lead and continued to extend her dominance throughout the 162km course to cross the finish line in 19:45:57, more than three hours ahead of Christie Lori in second. Jessica Schluter completed the all-Australian women’s KosciMiler podium in 23:55:15.

Stephanie Auston claiming the women's KosciMiler title 2025 — Stephanie Auston went one better this year [Photo credit: Sportograf]

In the men’s KosciMiler race, British runner Glazier stopped the clock in 17:38:25 to win his first 100-mile race. He was running amongst the top three for the majority of the day before hitting the lead at the 107km mark. The men’s podium was completed by New Zealand’s Liam Thierens and Great Britain’s Adrian de la Nougerede.

“It feels great, I put a lot of effort into training in the last six months from my last one,” said Glazier. “I actually came over to race in the World Trail Majors and I got sick, so when I saw this race it just looked beautiful and I thought you know what, I really want a target to do a Miler so I put everything into this block and I’m so happy that I managed to race such a beautiful course. Thank you to all the volunteers as well.

“Before my last one [Miler] I wasn’t expecting to go so well, so I wanted to go off really slowly and pace it well. So, with this one I wanted to push it a bit more at the start to see if I could hold on. I definitely found the last 30km quite difficult, but up until then I was cruising, running up all the hills – I think that’s where I was putting time on other people, I was running up everything, and I think it was quite a big mental boost overtaking people as I went through the day. The last 30km I did struggle a bit, but it’s a Miler, you’re never going to feel great the whole way through.”

By finishing on the KosciMiler podium, the top three men and women secured direct qualification into the UTMB (100-mile) race at the 2026 UTMB World Series Finals in Chamonix, France.

100km race

Melbourne-based British runner Broome was delighted to secure victory in the Kosci100 after finishing third two years ago. She broke the tape in 11:58:10, more than 17 minutes ahead of Sydney’s Anna Pillinger in second, with Western Australian Charlotte Lomas finishing third.

“It feels amazing to get the win, this is my first ever win at one of the UTMB Series races,” said Broome. “I was third here last time I did this race so to come back and just execute a better race and get rewarded with a better position is a really good feeling.

“My plan going in was just to try and keep a lid on it until Thredbo Valley trail, so I just tried to keep it feeling nice and easy all the way up Kosci and down the hill from Perisher and then try and just let the brakes off a bit. To be honest, it all went to plan. Obviously the last 15km up to Eagle’s Nest was a tough old slog and back down again, but all in all it was just a pretty good day,” she said.

Sophie Broome wins the Kosci100 title 2025 — Sophie Broome celebrates her win [Photo credit: Tim Bardsley-Smith]

By finishing on the Kosci100 podium, the top three men and women secured direct qualification into the CCC (100km) race at the 2026 UTMB World Series Finals in Chamonix, France – something Broome is looking forward to.

“That [qualification to the UTMB World Series Finals] was one of the main reasons for coming, I got a slot last time I raced Kosci, and I went to Chamonix last year and really enjoyed it but learned so much from the experience. It’ll be good to go back next year and have another crack at it,” she added.

In the men’s race, Lassere lived up to his billing as the top ranked runner in the Kosci100 field but was pushed all the way by Adelaide’s Godfrey Slattery – who only took up running 12 months ago and was making his 100km debut. Tasmanian Gerald Macpherson finished third.

“I’m very happy. I came to Australia with my girlfriend to do the race and travel a little bit and I trained very hard the last months,” said Lassere. “The race was very hard because I went together with one of the guys, he was very strong but at the end I feel I was just a little bit more fresh than him, so I’m very happy to win today.”

Lassere is now looking forward to racing at the UTMB World Series Finals in his home country next year.

“I will try to go to UTMB, I don’t know if I can, but minimum I will do CCC but if I can, UTMB,” he said.

50km race

Dimuantes led from start to finish across the 50km course, crossing the line in 4:04:08, more than eight minutes clear of Jack Ferris, with Ronan McNally rounding out the podium.

“It was amazing, a beautiful day to be out running in the high country, I haven’t been up here since Kosci last year which was much worse conditions than this year, it was beautiful, snow patches up high, ran on some trails I haven’t run on before, it was really nice,” said Dimuantes. “The plan was to try and control it more than usual because I’ve been a bit light on training but that never plays out, I kept it fairly consistent but had a bit of a crash at the end but that’s par for the course in the 50km.

“It was a good mix of trails, the TVT is runnable for a lot of it, but then that stuff up high is pretty rocky but beautiful snow patches and steep rocks, it was awesome,” he said. “It was cool to come through Bullocks and Thredbo because there was a lot of people there so that was nice.”

The finish line was a special moment for Dimuantes, with his newborn son joining him for the first time.

“First finish line for Fred which was exciting, he seems to be enjoying it which is nice but I think he spent most of the day asleep in the car which was good,” he said.

Icelandic runner Andrea Kolbeinsdottir was making her Ultra-Trail Kosciuszko by UTMB debut and impressed across the 50km, taking the win in 4:24:48, just under eight minutes ahead of Lucy Bartholomew, with Demi Caldwell just behind in third. As well as being the first female Kolbeinsdottir was third overall.

“It was amazing, very tough but of course I’m very happy with it,” said Kolbeinsdottir. “I’ve been looking forward to coming here, it’s a totally new environment for me, I’ve been living for the last two months in Torquay in Victoria, it’s very fun to explore new areas and it’s been an amazing trip so far.

“It means a lot, I did the World Champs in Spain two months ago and it was a rough day and had little motivation after it, so I’ve just been trying to keep training and to lift because I really wanted to do well here, I’m very glad that I pushed through the training to be able to be fit on the start line and that it paid off, ending the year like this is amazing.”