US national cross country mountain biking champion Keegan Swenson set the unofficial best time for the 'Everesting' challenge on Friday outside Salt Lake City, Utah.
In his Strava post, Swenson estimates his time to be 7:42 for the Everest mark, well inside former pro Phil Gaimon's unofficial record of 7:52:12, set on Monday in the Topanga State Park, near Los Angeles, but Cyclingnews' calculations put the time just below 7:40, if the Strava segment's measurements are accurate.
Swenson, who races for the Stan's No Tubes/Pivot Pro Team p/b Maxxis team, cracked the 8848m mark in the middle of his 29th repeat of the section, approximately 7 hours and 40 minutes into his ride, after 165km of riding.
Swenson completed the ride with fellow mountain biker Ryan Standish, who rode a longer segment of the climb and took over 11 hours to complete the elevation gain. Standish and Swenson took on the challenge as part of a fundraiser for the MS society. Standish' father was diagnosed with multiple sclerosis in 2012.
Several other riders have taken the Everesting challenge for various reasons.
James Piccoli (Israel Start-Up Nation) raised funds for protective gear for COVID-19 frontline workers on Mont-Royal in Montréal. Kevin Vermaerke (Hagens Berman Axeon) finished the elevation in 8:19:26 as a personal challenge. Giulio Ciccone (Trek-Segafredo), Mark Cavendish (Bahrain McLaren) and Luke Rowe (Team Ineos) did the challenge on Zwift, while Bora-Hansgrohe's Emmanuel Buchmann plans to take it on later this month to raise money for a children's charity.
Geraint Thomas completed a different epic challenge, riding three 12-hour rides on Zwift in April to raise funds for the British National Health Service (NHS), raising over £375,000.