Lopsang Jangbu Sherpa (c. 1971-73 - 25 September 1996) was a Nepalese Sherpa mountaineering guide, climber and porter, best known for his work as the climbing Sirdar for Scott Fischer's Mountain Madness expedition to Everest in Spring 1996, when a freak storm led to the deaths of eight climbers from several expeditions, considered one of the worst disasters in the history of Everest mountaineering. Notwithstanding controversy over his actions during that expedition, Lopsang was well-regarded in the mountaineering community, having summited Everest four times. Lopsang was killed in an avalanche in September 1996, while again on an expedition to climb Everest for what would have been a fifth ascent.