Canadian Woman Breaks Records in Antarctic Ultra Marathon
11th November 2026
The Canadian athlete, Stephanie Case, has become the first and fastest woman to run 100-miles non-stop in Antarctica. NEW
Competing at the Antarctic Ice Ultra, she recorded the second-fastest overall 100-mile time in Antarctica, completing the race in 17 hours, 31 minutes and 39 seconds.
She also set the 24-hour distance record in Antarctica, walking 2 extra loops once finished to lay the claim.
Stephanie Case in Antarctica . Credit @peakpixelcafe
“I’m really proud of the result,” said Stephanie, who is sponsored by The North Face.
“I ran five hours and ten minutes faster than last year’s record.
“But the current record holder ran even faster than that and beat his own time by five hours and forty minutes!
“It was incredible – he was only going for sub-20 and finished in 17 hours instead, so we really pushed each other to get the best out of our performances.
“I was going for the overall record, and while I didn’t get it, I am proud of how much I beat last years’ time by and how close I got.
“You can’t control who is out there on the day, and Yusheng Ni is an impressive athlete to go toe-to-toe with!”
Stephanie Case in Antarctica . Credit @peakpixelcafe
The course was 38 laps of a 4.2 km loop in the Schirmacher, with strong winds and temperatures as low as -35°C.
After finishing the 100-mile course, she walked two additional loops, meaning she also set a 24-hour distance record.
Both a major physical and mental challenge due to the extreme Antarctic environment, the race required careful management of temperature, effort and fuelling.
Stephanie Case in Antarctica . Credit @peakpixelcafe
In November 2024, Stephanie became a mother to her daughter Pepper.
She expresses pride in proving that motherhood is not a barrier to ambitious athletic goals, challenging the narrative that mothers should scale back on adventure and competition and instead embrace it.
“This race reminds me that motherhood isn’t the finish line,” added Stephanie.
“Many people said to me when I was pregnant to enjoy myself now because I wouldn’t be able to do any of these adventures once I had a child.
“I just wanted to prove that moms can and should be out there doing big things.
“And even bigger things than we did before.
“I can’t wait to go home and tell Pepper all about this.
“She got to watch me on the livestream finish the race, and that was pretty special.”
Stephanie Case in Antarctica . Credit @peakpixelcafe
Her previous ultra-running accolades include:
- First place woman in Ultra Trail Snowdonia in May 2025
- Second place at Hardrock 100 in July 2022
- First place woman to finish the Tor des Glaciers in September 2021
She also shared how proud she feels about representing women in ultra-running and pushing the boundaries of what is possible for women in this sport.
“With this race, I’ve put women on the map, and I’ve become the first woman to run 100 miles nonstop in Antarctica,” added Stephanie.
“I did it in a time that I’m really proud of.
“I would be proud of that time in Chamonix, let alone Antarctica.”
Stephanie Case in Antarctica . Credit @peakpixelcafe
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