Mount McKinley, or Denali, in south central Alaska is North America's highest mountain. It is a twin-peaked mountain. The higher South Peak, 20,320 feet (6,190 m), first was climbed by the Hudson Stuck expedition in 1913. The North Peak, 19,470 feet (5,934 m), was first climbed by the Sourdough party in 1909. W.A. Dickey, a prospector, named the mountain for future President William McKinley in 1896. Previously, the mountain was known as Densmore's Peak. Earthquakes sheared off much of the south face in 1912.