2015’s Everest was based on the true-life Mount Everest Disaster of 1996, recreating the overwhelming challenges faced by the real climbers who were trapped on that mountain almost thirty years ago. One of the single deadliest days in the recorded history of the world’s tallest peak, the film recounts the expedition taken on by two groups of mountaineers that ended in death for eight climbers, including the two experienced leaders of the expeditions, Rob Hall (Jason Clarke) and Scott Fischer (Jake Gyllenhaal).

https://screenrant.com/everest-true-story-1996-disaster-explained/