Most climbs of Everest without supplementary oxygen

Ang Rita Sherpa (Nepal, b. 27 July 1948) climbed Everest 10 times between 7 May 1983 and 23 May 1996, all without the use of bottled oxygen. The record remains unequalled as of November 2018.

Ang Rita Sherpa’s climbing career also includes nine successful ascents of three other 8,000-ers – the world’s 14 highest mountains, all rising above 8,000 metres: he climbed Kangchenjunga (Nepal/India), the third highest mountain in the world at 8,586 m, once in 1986; Cho Oyu (China/Nepal), the sixth highest mountain at 8,188 m, four times between 1984 and 1995 and Dhaulagiri I (Nepal), the seventh highest mountain at 8,167 m, also four times between 1979 and 1982. All these ascents were also achieved without the use of supplementary oxygen.