Camp Half Southwest Ridge (5,400 metres)
The walk to Camp Half (or advanced base camp - ABC) follows a well-worn track up a moraine ridge which curves around behind the SW ridge. Camp Half is situated at the start of a boulder field and is just out of sight of Base Camp itself. The highest altitude gain of the whole climb is made between Base Camp and Camp 1 (1130m) and as such Camp Half was introduced to offer some respite to the climbers in the early stages of acclimatisation.
Andy Chapman (Jagged Globe)