Ed Viesturs

Ed Viesturs (born 1959) is an American high-altitude mountaineer, corporate speaker and author well known in the climbing community. He was the first American to climb all 14 of the eight-thousander mountains, and the fifth person to do so without supplemental oxygen. In 2023 Guinness World Records reclassified the first person to summit the true summits of all the 8,000 metre peaks and awarded Viesturs the record for the first ascent of all 14, a claim that has been disputed, including by Viesturs himself. He took part in the 1996 IMAX filming of Everest shortly after the 1996 Mount Everest disaster, and his team summited thirteen days after it with a film crew.