Kílian Jornet

Jornet's range runs from the 42km sky race at Zegama, which he has won more often than anyone, to the 100-mile mountain classics: four UTMB titles across 14 years, the 2011 Western States and multiple Hardrock wins. He added world titles in ski mountaineering and two ascents of Everest without supplementary oxygen in a week in 2017. No one has been elite for so long across such different mountain formats, though the runnable Western States course has been the hardest for him to repeat.