Source – Outside Magazine –  Human lung and star ultrarunner Kilian Jornet has nabbed the fastest known time (FKT) for ascending and descending Alaska’s 20,237-foot Mount McKinley, completing the West Buttress route in June 2014 in a thigh-frying 11 hours, 40 minutes. Though records on McKinley are only loosely tracked, the previous FKT was 16 hours, 46 minutes, set by Ed Warren in 2013.