On November 9, 2009, Humar, who was on a solo climb via the South Face of Langtang Lirung (last climbed in 1995), had an accident during the descent. His only contact with the base camp staff via a satellite phone was made on the day of the accident and he appeared to be in critical condition with leg, spine and rib injuries. He was stuck on the mountain at an elevation of approximately 6,300 meters for several days before his body was found on November 14, 2009 at an elevation of 5,600 meters.