Big wall climbing
Big wall climbing is a form of rock climbing that takes place on both very long and very sheer multi-pitch climbing routes – of at least 10 pitches or 300–500 metres (980–1,640 ft) in length – that require a full day, if not several days, to ascend. Big wall routes are sustained and exposed and the climbers typically remain suspended from the continuously sheer and vertical rock face, even hanging from the face when sleeping, with limited options to sit down or escape unless they abseil down the route—which is itself a complex and risky action.