American runner Tyler Andrews left today for the summit of Everest, hoping for a Fastest Known Time without oxygen. That won’t happen — at least not on this occasion. He is still going up but has resorted to bottled oxygen. Andrews will now try to break Lakpa Gelu Sherpa’s oxygen-assisted record of 10 hours, 56 minutes, and 46 seconds, set on May 26, 2003.
In a just-in-case video recorded in advance and posted on his Instagram stories, Andrews explains that due to adverse weather, he has started using supplemental oxygen. Based on when this video was posted, Andrews probably started using oxygen at Camp 2. At the time of writing the story, Andrews was making good progress above Camp 3.