no oxygen

Renowned American ultrarunner Tyler Andrews is setting his sights on the Fastest Known Time (FKT) for ascending Mount Everest without supplemental oxygen this May. The 34-year-old must trek from Base Camp to the peak in less than 20 hours and 24 minutes to beat Kaji Sherpa’s 1998 record. Andrews has already built an impressive resume of FKTs on Manaslu, Aconcagua, […]