Apa Sherpa's 21 ascents: Apa Sherpa (Nepal) reached the summit of Mt Everest for the 21st time on 11 May 2011, the most times anyone has ever successfully climbed the world's highest mountain. His climbs to date have been: 10 May 1990: International 8 May 1991: Sherpa Support 12 May 1992: New Zealand 7 Oct 1992: International 10 May 1993: USA 10 Oct 1994: International 15 May 1995: American on Sagarmatha 26 Apr 1997: Indonesian 20 May 1998: EEE 26 May 1999: Asian-Trekking 24 May 2000: Everest Environmental 16 May 2002: Swiss 50th anniversary 26 May 2003: Commemorative US expedition 17 May 2004: Dream Everest 31 May 2005: Climbing for a Cure 19 May 2006: Team No Limit 16 May 2007: SuperSherpas 22 May 2008: Eco Everest 21 May 2009: Eco Everest 21 May 2010: Eco Everest 11 May 2011: Eco Everest