David Allen Hahn (born November 3, 1961, Okinawa, Japan) is an American professional mountain guide, ski patroller, journalist and lecturer. In May 2013, he reached the summit of Mount Everest for the 15th time—the most for a non-Sherpa climber, according to Outside Magazine contributor and climber Alan Arnette. Among Hahn's other notable accomplishments are his 35 summits of Vinson Massif, Antarctica's highest mountain. He has reached the summit of Denali in Alaska, North America's highest peak, 21 times over the course of 30 expeditions.