In a breathtaking display of endurance and precision, American trail runner and mountaineer Tyler Andrews has rewritten the record books for the fastest known time (FKT) to ascend Mount Everest using supplemental oxygen. Climbing from Base Camp (5,364 meters / 17,598 feet) to the summit (8,848 meters / 29,031 feet) in just 9 hours and 55 minutes, Andrews eclipsed the previous record—held by Lakpa Gelu Sherpa since 2003—by a staggering 61 minutes. The achievement, confirmed on May 28, 2026, marks the culmination of years of preparation, multiple failed attempts, and a relentless pursuit of excellence in the world’s most extreme endurance sport.

Breaking the Mold: How Andrews Did It

Andrews’ ascent wasn’t just about raw speed—it was a masterclass in strategic planning, adaptive problem-solving, and high-altitude efficiency. Unlike previous record holders who often relied on Sherpa support or prolonged acclimatization, Andrews executed a near-flawless solo push, leveraging his background as a trail runner to maintain a relentless pace.

Key milestones from his record-breaking climb include:

• Camp 1 (6,065m / 19,900ft): Reached in approximately 2 hours and 15 minutes.
• Camp 2 (6,500m / 21,325ft): Cleared in under 3 hours from Base Camp.
• Camp 3 (7,300m / 24,000ft): Passed at 4:47 elapsed, demonstrating an unyielding rhythm.
• Camp 4 (7,920m / 26,000ft): Reached at 6:46 elapsed, just over an hour after leaving Camp 3.
• South Col (8,020m / 26,315ft): The final push to the summit took just under 3 hours, with Andrews summiting at 9:55 elapsed.

Why the oxygen? While Andrews used supplemental oxygen—a category that excludes “no-oxygen” FKTs—his approach was far from conventional. Most climbers conserve oxygen for the final “death zone” above 8,000 meters. Andrews, however, deployed it early and strategically, allowing him to maintain a consistent 700–800 meter-per-hour ascent rate through the treacherous Khumbu Icefall and Lhotse Face. “The key was balancing oxygen use with movement efficiency,” Andrews told iRunFar in a post-ascent interview. “You can’t just burn through cylinders—you have to pace yourself like a marathon.”

The Grind Behind the Record

This wasn’t Andrews’ first attempt. In fact, it was his fifth major push for the Everest FKT, with three previous attempts in spring 2025 and an earlier failed bid in 2026. Each time, factors beyond his control—avalanche risks, oxygen shortages, gear failures, and weather windows—derailed his plans. But unlike many climbers who might abandon the quest, Andrews returned, refining his approach.

His preparation included:

• Altitude training: Spending months in Nepal and Tibet, including stints at Camp 2 and Camp 3 to simulate conditions.
• Gear optimization: Lightweight, modular climbing systems designed for speed, including a custom oxygen setup.
• Mental conditioning: Visualization techniques and pacing drills borrowed from ultra-endurance running.
• Route familiarity: Repeated reconnaissance hikes to memorize the most efficient paths.

The final attempt came near the close of the 2026 climbing season, when the window for summit bids narrows due to the onset of monsoon rains. Andrews’ success hinged on perfect timing: the “Ice Doctors”—Sherpa teams who set the route through the Khumbu Icefall—had just completed their seasonal preparations, and weather forecasts predicted a rare stable, high-pressure system for the summit push.

What This Record Means for Himalayan Speed Climbing

Andrews’ achievement isn’t just a personal milestone—it signals a shift in how speed ascents are approached in the Himalayas. Traditionally, Everest FKTs have been dominated by Sherpa climbers with decades of high-altitude experience. Andrews, a non-Sherpa trail runner, proves that endurance athletes from outside the traditional climbing community can compete at the highest levels.

Key implications:

• Redefining “speed”: Andrews’ time is the fastest ever recorded with oxygen, but his methods—early oxygen use, trail-running pacing—challenge conventional wisdom. Could this become the new standard?
• Training crossover: His background in trail running suggests that athletes from ultramarathons, skyrunning, and adventure racing may increasingly target Everest FKTs, bringing fresh strategies to the mountain.
• Equipment evolution: His custom oxygen system and lightweight gear could inspire innovations for future speed climbers.
• Accessibility debate: While Andrews used Sherpa support for Base Camp logistics, his ascent raises questions about whether non-professional climbers can achieve FKTs with advanced training.

Yet, the record also underscores the unpredictability of Everest. Just days before his successful bid, Andrews made an unsuccessful attempt due to oxygen supply issues. “The mountain doesn’t care about your plans,” he said. “It’s about adapting in real time.”

Looking Ahead: What’s Next for Andrews?

With the Everest FKT secured, Andrews is already setting his sights on new challenges. In interviews, he’s hinted at pursuing the “Everest FKT without supplemental oxygen”—a far more daunting task that would require a 16+ hour ascent under extreme physical strain. He’s also considering a K2 speed attempt, though the technical demands of that mountain present a different set of hurdles.

For now, Andrews is taking time to recover and reflect. “This was a team effort—my coaches, my Sherpa partners, and the entire climbing community who’ve supported me,” he said. “But the mountain is still teaching me. There’s always more to learn.”

How to Follow the Story

Andrews’ ascent has sparked global interest in high-altitude endurance sports. To stay updated:

• Follow Tyler Andrews’ official channels for training updates and future expeditions.
• Track Everest FKT records via the iRunFar database or the 8000ers forum.
• Watch for announcements on the 2027 climbing season, which may see new attempts on Andrews’ records.

Key Takeaways

• New Record: Tyler Andrews’ 9 hours, 55 minutes is the fastest oxygen-assisted Everest ascent ever, beating Lakpa Gelu Sherpa’s 2003 mark by 61 minutes.
• Innovative Approach: Early oxygen use and trail-running pacing strategies redefined speed climbing tactics.
• Endurance Crossover: Proves non-Sherpa athletes can compete at the highest levels with specialized training.
• Unpredictability Factor: Even record holders face Everest’s whims—Andrews’ earlier failures highlight the mountain’s challenges.
• Future Challenges: Next targets include the no-oxygen Everest FKT and potential K2 speed attempts.

As Andrews steps off the mountain, one thing is clear: the bar for Everest speed ascents has been raised. Whether other climbers adopt his methods or push for even faster times, the legacy of this record will be felt for years to come.