Tyler Andrews breaks oxygen-assisted Everest record, 9h55m

American endurance athlete Tyler Andrews has reportedly set a new speed record for an oxygen-assisted ascent of Mount Everest, reaching the summit from Base Camp in 9 hours and 55 minutes. The climb, which took place on the night of May 27 into the early morning of May 28, would lower the previous record of 10 hours and 56 minutes set by Lakpa Gelu Sherpa in 2003 by just over an hour. The time is pending formal verification by official bodies.

Andrews began his ascent from Everest Base Camp at 7:11 p.m. local time on May 27. According to tracking updates and team reports, he reached the summit at 5:06 a.m. on May 28. The route covered approximately 8.4 miles from Base Camp at 17,598 feet to the 29,031-foot summit, gaining roughly 11,500 feet in elevation through the Khumbu Icefall, the mountain's higher camps, the South Col, and the final summit ridge.

This successful attempt followed several previous efforts by Andrews to establish a speed record on Everest, most of which were focused on a climb without supplemental oxygen. Those attempts in 2025 and earlier this spring were thwarted by severe weather, unstable snow conditions, avalanche risk, and logistical challenges, forcing...