Juan Eusebio Oiarzabal Urteaga (born 30 March 1956), commonly known as Juanito Oiarzabal, is a noted Spanish Basque mountaineer. He has written four books on the subject. He was the 6th man to reach all 14 eight-thousander summits, and the third to do so without supplemental oxygen. He was the first person to climb the top three summits twice (Everest + K2 + Kangchenjunga) and the oldest climber to summit Kangchenjunga, at almost 53, until Carlos Fontan did so in 2014, at 75 years old.
In 2004, he lost all his toes to frostbite after summiting K2.
In 2009, he announced wanting to become the first person in history to reach a "double 14", summiting each 8000er twice. In April 2010 he reached 24 eight-thousanders, after climbing Annapurna, a world record. In 2011 he climbed Lhotse for a second time, which was his 25th eight-thousander. He is second all-time for 8000er ascents behind Nepali climber Phurba Tashi Sherpa, who has 30.
His success in the Himalayas is documented, but before starting on those ascents he had already accumulated an extensive resume in Spain. He undertook ascents on all the Spanish mountain masses, including technically demanding paths, and also several first ascents. He has extensive experience in climbing the Alps, undertaking climbs for the technical challenges they presented. In addition to his climbs in the Alps, he has climbed in North America, South America, and Africa. To date, he has participated in 35 Himalayan expeditions over a period of 23 years.
1984 – Denali ( known also as McKinley) (6,194 m or 20,322 ft) – West Buttress Route.
1983 – Aconcagua (6,957 m or 22,825 ft) – 5th world winter ascent (he has accredited 16 ascents to the Aconcagua, as a "guide").
1988 – Mount Kenya – Diamond Corridor.
1982 – Kangchuntse (Makalu II) (7,640 m or 25,070 ft). Altitude reached: 7,200 m (23,600 ft).
1988 – Kangchenjunga (8,586 m or 28,169 ft). North side. Altitude reached: 8,000 m (26,000 ft).
1989 – Makalu (8,465 m or 27,772 ft). West Pillar. Altitude reached: 8,350 m (27,400 ft).
1990 – Everest (8,848 m or 29,029 ft). Southwest side. Altitude reached: 8,300 m (27,200 ft).
1991 – Kangchenjunga (8,586 m or 28,169 ft). North side. Altitude reached: 8,400 m (27,600 ft).
1993 – Everest (8,848 m or 29,029 ft). South-Southeast Route - crest. Summit.
1995 – Makalu (8,465 m or 27,772 ft). Normal route. Summit.
1995 – Lhotse (8,516 m or 27,940 ft). Normal Route. Summit.
1996 – Kangchenjunga (8,586 m or 28,169 ft). North side. British route. Summit.
1997 – Manaslu (8,163 m or 26,781 ft). Normal route. Summit.
1998 – Dhaulagiri (8,167 m or 26,795 ft). Normal route. Summit.