Hillary Step
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The Hillary Step is a nearly vertical part (height around 40 ft) of upper Mount Everest. It lies almost at the top of the mountain, halfway from the "south summit" to the summit top, and is the last real challenge before the summit. It is reached by climbing the South East route. It was named after Sir Edmund Hillary, who was the first person, along with Tenzing Norgay, who passed it to reach the summit. It is at about 28,840 feet above sea level.
The Hillary Step is a bottleneck. These are highly dangerous to climb up because, among other things, they are thinner at the top than at the bottom. More people will have to wait at the bottom, and they may get hypothermia by standing in one place. These days, ascent of the step is made with the assistance of fixed ropes, usually placed there by the first ascending team of the season.