Ice climbing

Ice climbing is a climbing discipline that involves ascending routes consisting entirely of frozen water. To ascend, the ice climber uses specialist equipment, particularly double ice axes (or the more modern ice tools) and rigid crampons. To protect the route, the ice climber uses steel ice screws that require skill to employ safely and rely on the ice holding firm in any fall. Ice climbing routes can vary significantly by type, and include seasonally frozen waterfalls, high permanently frozen alpine couloirs, and large hanging icicles. Ice climbing originated as a subdiscipline of alpine climbing, where sections of scalable ice are encountered on alpine routes alongside segments that require rock or mixed climbing. Ice climbing arose as an independent sport in the 1970s. Modern ice climbing includes a difficulty grading system that peaks at WI6 to WI7, as ice tends to hang vertically at its most severe. WI7 is very rare and usually attributed to overhanging ice with serious risk issues (i.e. unstable ice, little protection, and a risk of death). Advancements in mixed climbing in the 1980s pushed the technical difficulty of ice-climbing routes by introducing rock overhangs and roofs that can entail dry-tooling, which is the use of ice tools on bare rock. Since 2002, the UIAA have regulated competition ice climbing, which is offered in a lead climbing format on an artificial bolted wall, generally on indoor rock climbing artificial walls without ice, that employs dry-tooling techniques (e.g. stein pulls and figure-four moves), and in a speed climbing format that uses a standardized wall of real ice. Since 2010, ice climbers at Helmcken Falls in Canada have used the unique characteristics of the waterfall to create severely overhanging bolted ice climbing routes that are graded up to WI13, and are the hardest technical ice climbs in the world.