Swedish runner sets new FKT on legendary El Capitan

Petter Restorp opted for running shoes instead of climbing gear when he tackled the Yosemite mountain

Courtney Dauwalter sets a remarkable FKT in Colorado

The two-time UTMB champion snags her first fastest known time

British athlete demolishes Pacific Crest Trail speed record

Perry battled delirium, heatstroke, bruised ribs and extreme dehydration in his 4,270 km record-setting FKT