Topic: Altitude

George McGerhin shares the grueling reality of ultra-marathon running, noting that the enjoyment typically ends after the first five hours, at which point the race becomes a mental battle against the body's urge to stop. He recounts a specific failure in Peru during a North Face challenge where, after 70 kilometers, race officials pulled him off the mountain due to safety concerns regarding altitude and timing. He emphasizes that failing to finish (DNF) is a part of the learning process and should not be taken too seriously.