A guide on Mount Everest, 57 year old Hillary Dawa Sherpa, was separated from the British climber he had been hired to guide, ran out of oxygen, fell into a crevasse, was trapped in the crevasse for 2 and a half days before freeing himself and walking/crawling back towards base camp. He was alone on the mountain for 6 days.
Yes! Just to clarify, he was found alive and most reports state he was only treated for frostbite on his hands and a fracture. He survived on chocolate and chunks of ice for almost a week while descending Everest alone and injured.
