How many people have climbed Mount everest without oxygen?

Answer 1

Up to the end of 2014 there has been 193 ascents to the summit of Mount Everest without oxygen. Not very many when you consider that there has been around 5,000 people who have reached the summit of the highest mountain in the world.

Answer 2

Yes you can climb Mount Everest without oxygen but not many have due to the thin air at high altitude.

Reinhold Messner and Peter Habeler were the first to climb Mount Everest without any Artificial Oxygen on the 8th May 1978

Answer 3

Every year there are hundreds of people at the base of Mount Everest hoping to reach its high summit, 99.9% of these people will be using oxygen.

There may be just one person each year who attempt to reach the summit without oxygen.