The Hornbein Couloir is a notable narrow and steep couloir high to the west on the north face of Mount Everest in Tibet, that extends from about 8000 m to 8500 m elevation, 350 metres below the summit. For the first 400 m vertical, the couloir inclines at about 47 degrees, and the last 100 m is narrower and steeper with about a 60 degree average incline. To the east on the north face with less angle is the much larger Norton Couloir.