Bartek Ziemski of Poland summited Everest today without bottled oxygen, the first no-oxygen ascent of Everest this season. Despite the crowds, he then completed only the second nonstop ski descent all the way back to Base Camp, including through the Khumbu Icefall, without O₂. Amazingly, he accomplished all this without any Sherpa or other support, carrying his own equipment, tent, and supplies up and down the mountain.
One week ago, Ziemski performed the same feat on Lhotse and his descent of Everest today completed the first double ski descent of Lhotse and Everest in the same season. On both mountains, he carried up and retrieved his own gear and didn’t rely on supplemental oxygen or anyone else to accompany him.
Incidentally, his climb to the summit today was the first no-oxygen ascent of Everest this season and his climb last week was the first no-oxygen ascent of the season on Lhotse. The ski descent of Lhotse was the first from the summit all the way down to Base Camp, and the first ever without oxygen.
Everest, on the other hand, was climbed without oxygen and skied down completely once before. In the fall of 2025, Andrzej Bargiel accomplished that feat, but he had a team fixing the route, setting the camps, and breaking trail. Ziemski had no support except for the packed trail and fixed ropes established by the commercial outfitters for their clients. He didn't rely on Sherpas or anyone else to carry his equipment, had no drones, and no support team. Bargiel had a team to film the climb and the descent. Ziemski had to ask another climber to take a photo of him while on the summit of Everest. Finally, Bargiel hadn't accomplished the same feat the week before on Lhotse.
Meanwhile, it's full tourist client season on Everest. Several small groups outfitted by Nepalese outfitters summitted on Sunday and the numbers multiplied on Monday. The peak summit days could be today and tomorrow, the day chosen for summit attempts by many of the groups that left Base Camp on Sunday. The Lhotse Face is reportedly a traffic jam from top to bottom in an endless line of climbers intending to summit tomorrow.

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