In June 2025, Ethan Berman, Sebastian Pelletti and Maarten van Haeren spent ten days climbing and descending the enormous Southeast Pillar of 7,388-meter Ultar Sar in Pakistan—a route that had defied attempts for more than 30 years. Armed with knowledge gained from their expedition to the same peak in 2024—and blessed with a lengthy weather window that arrived just as they completed acclimatization—the trio quickly reached a point higher than any prior team, climbing mostly at night. They then tackled the crux pillar at the top of the route over the next two and a half days and summited on day six out of base camp. The descent of the pillar required more than 70 rappels.
To learn all about this landmark climb and the history of this difficult and dangerous mountain, Cutting Edge host Jim Aikman spoke with Ethan Berman and Maarten van Haeren, as well as Karakoram expert Steve Swenson and American Alpine Journal Editor Dougald MacDonald.
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In June 2025, Ethan Berman, Sebastian Pelletti and Maarten van Haeren spent ten days climbing and descending the enormous Southeast Pillar of 7,388-meter Ultar Sar in Pakistan—a route that had defied attempts for more than 30 years. Armed with knowledge gained from their expedition to the same peak in 2024—and blessed with a lengthy weather window that arrived just as they completed acclimatization—the trio quickly reached a point higher than any prior team, climbing mostly at night. They then tackled the crux pillar at the top of the route over the next two and a half days and summited on day six out of base camp. The descent of the pillar required more than 70 rappels.
To learn all about this landmark climb and the history of this difficult and dangerous mountain, Cutting Edge host Jim Aikman spoke with Ethan Berman and Maarten van Haeren, as well as Karakoram expert Steve Swenson and American Alpine Journal Editor Dougald MacDonald.
A Bold Way Down Denali: Cutting-Edge Ski Alpinism with Tiphaine Duperier
The Cutting Edge
56 minutes 29 seconds
2 years ago
A Bold Way Down Denali: Cutting-Edge Ski Alpinism with Tiphaine Duperier
Tiphaine Duperier and Boris Langenstein from France have made first ski descents in many parts of Asia. But until 2022, Tiphaine had never been to North America. In May, she flew to Alaska with Boris to pursue a crazy dream: a ski descent of the Cassin Ridge on Denali. The two quickly realized this wouldn’t be possible (at least this year), but an alternate vision soon appeared: a ski line down the upper southwest face of Denali. On May 31, the two climbed to the summit and started down just to skier’s right of the upper Cassin. After descending about 1,000 meters, they made a long, terrifying traverse to join the West Rib route and continued down all the way to the Northeast Fork of the Kahiltna Glacier. The total descent was more than 3,800 meters. For this episode of the Cutting Edge, Tiphaine spoke with guest interviewer Brody Leven, a professional ski mountaineer himself, about the planning and execution of this bold descent.
The Cutting Edge
In June 2025, Ethan Berman, Sebastian Pelletti and Maarten van Haeren spent ten days climbing and descending the enormous Southeast Pillar of 7,388-meter Ultar Sar in Pakistan—a route that had defied attempts for more than 30 years. Armed with knowledge gained from their expedition to the same peak in 2024—and blessed with a lengthy weather window that arrived just as they completed acclimatization—the trio quickly reached a point higher than any prior team, climbing mostly at night. They then tackled the crux pillar at the top of the route over the next two and a half days and summited on day six out of base camp. The descent of the pillar required more than 70 rappels.
To learn all about this landmark climb and the history of this difficult and dangerous mountain, Cutting Edge host Jim Aikman spoke with Ethan Berman and Maarten van Haeren, as well as Karakoram expert Steve Swenson and American Alpine Journal Editor Dougald MacDonald.
