The Khumbu icefall is a treacherous stretch of a route used to reach the summit of the 8,850 - metre ( 29,029 - foot ) mountain .
The Khumbu icefall is a steep portion of a glacier shaped like a frozen waterfall .
The Khumbu icefall , a steep portion of a glacier shaped like a frozen waterfall , is a treacherous stretch of a route used to reach the summit of the 8,850 - metre ( 29,029 - foot ) mountain .