Rock climbing

Rock climbing is a climbing sports discipline that involves ascending routes consisting of natural rock in an outdoor environment, or on artificial resin climbing walls in a mostly indoor environment. Routes are documented in guidebooks, and on online databases, detailing how to climb the route (called the beta), and who made the first ascent (or FA) and the coveted first free ascent (or FFA). Climbers will try to ascend a route onsight, however, a climber can spend years projecting a route before they make a redpoint ascent.

Routes range from a few metres to over a 1,000 metres (3,300 ft) in height, and traverses can reach 4,500 metres (14,800 ft) in length. They include slabs, faces, cracks and overhangs/roofs. Popular rock types are granite (e.g. El Capitan), limestone (e.g. Verdon Gorge), and sandstone (e.g. Saxon Switzerland) but 43 types of climbable rock types have been identified. Artificial indoor climbing walls are popular and competition climbing — which takes place on artificial walls — became an Olympic sport in 2020.

Contemporary rock climbing is focused on free climbing where — unlike with aid climbing — no mechanical aids can be used to assist with upward momentum. Free-climbing includes the discipline of bouldering on short 5-metre (16 ft) routes, of single-pitch climbing on up to 60–70-metre (200–230 ft) routes, and of multi-pitch climbing — and big wall climbing — on routes of up to 1,000 metres (3,300 ft). Free-climbing can be done as free solo climbing with no protection whatsoever, or as lead climbing with removable temporary protection (called traditional climbing), or permanently fixed bolted protection (called sport climbing).

The evolution in technical milestones in rock climbing is tied to the development in rock-climbing equipment (e.g. rubber shoes, spring-loaded camming devices, and campus boards) and rock-climbing technique (e.g. jamming, crimping, and smearing). The most dominant grading systems worldwide are the 'French numerical' and 'American YDS' systems for lead climbing, and the V-grade and the Font-grade for bouldering. As of August 2025, the hardest technical lead climbing grade is 9c (5.15d) for men and 9b+ (5.15c) for women, and the hardest technical bouldering grade is V17 (9A) for men and V16 (8C+) for women.

The main types of rock climbing can trace their origins to late 19th-century Europe, with bouldering in Fontainebleau, big wall climbing in the Dolomites, and single-pitch climbing in both the Lake District and in Saxony. Climbing ethics initially focused on "fair means" and the transition from aid climbing to free climbing and latterly to clean climbing; the use of bolted protection on outdoor routes is a source of ongoing debate in climbing. The sport's profile was increased when lead climbing, bouldering, and speed climbing became medal events in the Summer Olympics, and with the popularity of films such as Free Solo and The Dawn Wall.

A key concept in many types of rock climbing is that of the 'lead climbing pair'. One member — the 'lead climber' — will try to climb the route and overcome its challenges with a rope attached to their harness. The other member — the 'belayer' (or 'second') — will remain standing at the base of the route but controlling the other end of the rope, which is called belaying. The 'belayer' uses a mechanical belay device to attach the rope to their harness from which they can 'pay-out' the rope as the 'lead climber' ascends but with which they can lock the rope if the 'lead climber' falls. Once the 'lead climber' reaches the top, they create an anchor from which they can act as the 'belayer' (but from above), controlling the rope while the 'second' ascends.

Another key concept is that of climbing protection (or 'gear' or 'rack'). Early 20th-century rock climbers relied on the 'lead climber' looping the rope around natural spikes of rock as they ascended. If they fell, and the 'belayer' held the rope fast — which they would have to do manually by looping the rope around their waist — the 'lead climber' would hang from the rope if it had stayed looped around a spike of rock — if it didn't, they fell to the ground. Modern rock climbers use mechanical protection devices placed along the route, into which the 'lead climber' clips the rope as they ascend; if they fall, the 'belayer' will lock the rope, and the 'lead climber' will fall until they hang from the last 'protection device' that they had clipped the rope into. This protection can be removable (which is known as traditional climbing), or permanently fixed into the rock (which is known as sport climbing).

If the 'lead climber' falls, the 'belayer' will immediately lock the rope using their belay device, and the 'lead climber' will fall twice the distance that they are above their last piece of climbing protection. If this piece of climbing protection fails — a major risk of traditional climbing — and rips away from the rock, they will keep falling until their next piece of protection holds the rope (a zipper fall is where several pieces fail). On some routes, the opportunities for placing protection are poor so that the 'lead climber' is forced to leave large gaps between protection points — called a runout — so that any fall will be large (called a whipper). The wide variety of types of rock climbing offers safe ways for beginners to access the sport before learning to lead climb, including top roping and bouldering, and many will try leading on sport-routes first before attempting traditional-routes.