Alex Honnold (born August 17, 1985) is an American rock climber best known for his free solo ascents of big walls. Honnold rose to worldwide fame in June 2017 when he became the first person to free solo a route on El Capitan in Yosemite National Park (via the 2,900-foot route Freerider at 5.13a, the first-ever at that grade), a climb described in The New York Times as "one of the great athletic feats of any kind, ever." Honnold also holds the record for the fastest ascent of the "Yosemite Triple Crown", an 18-hour, 50-minute link-up of Mount Watkins, The Nose, and the Regular Northwest Face of Half Dome. In 2015, he won a Piolet d'Or in alpine climbing with Tommy Caldwell for their completion of the enchainment (known as the Fitz Traverse) of the Cerro Chaltén Group (or Fitzroy Group) in Patagonia over 5 days.
Honnold is the author (with David Roberts) of the memoir Alone on the Wall (2015) and the subject of the 2018 biographical documentary Free Solo, which won a BAFTA and an Academy Award.
