Rock climbing

• 1. Introduction

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  Rock climbing asks a simple question: can you get up that wall? The answer, it turns out, has consumed generations of human beings, driven them into arguments that bordered on war, and produced athletes who can haul themselves up blank vertical granite with nothing but the tips of their fingers and a pair of rubber shoes. Routes can be just a few metres tall or stretch beyond 1000 m. The world's longest rock climb, the El Capitan Girdle Traverse, runs 4500 m horizontally across the face of El Capitan. People have spent years attempting a single 4 m problem called Burden of Dreams. What does it take to move up stone? And why has a sport that began with Victorian-era mountaineers scrambling up the Lake District turned into an Olympic discipline watched by millions? Those are the threads this documentary will follow.

• 2. How a Climb Works

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  Every rock climbing route begins with someone making the first ascent, and that person's name goes into the record books alongside the route itself. Guides and online databases like theCrag.com and MountainProject.com then document exactly how to climb it, step by step, in a body of knowledge the climbing world calls the beta. The individual who gets up a route without any artificial help, and without having seen it before, achieves something called an onsight, the most prestigious single-attempt style in climbing. A climber who has studied the beta but still makes it on their first try earns a flash. Most major new routes are conquered only after many failed attempts, a process called projecting, and the eventual successful ascent is called a redpoint.

  The lead climbing pair is the fundamental unit of the sport. One person, the lead climber, goes up the wall with a rope attached to their harness. Their partner, the belayer, stands at the base controlling the other end of the rope through a mechanical belay device. If the lead climber falls, the belayer locks the rope and the climber drops twice the distance above their last piece of protection before the rope catches them. On routes where protection placements are scarce, those stretches between anchor points are called runouts, and a large fall on a runout is known as a whipper. When the lead climber reaches the top, the roles reverse and the belayer climbs up to join them.

  Descending a cliff that offers no easy walk-off requires a separate technique entirely: abseiling, or rappelling as North Americans call it. The climber threads a fixed rope through an anchor at the top of the route and uses a descending device to lower themselves under control. Without it, completing many big wall routes would be impossible.

• 3. Rock Types and Route Geography

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  Granite, limestone, and sandstone are the most commonly climbed rock types, each demanding different skills from the people on them. El Capitan in Yosemite sits on granite, which offers large cracks and excellent grip. The Verdon Gorge in France is limestone, a rock prized for its detailed holds. Saxon Switzerland in Germany is sandstone, a softer material whose sculpted features require careful footwork. Researchers have identified 43 climbable rock types in total, and routes have been documented on everything from the gritstone of Stanage Edge in England to the iron rock of Hueco Tanks in Texas, where the V-grading system for bouldering was invented.

  Route character varies just as much as rock type. Slab climbs are smooth and off-vertical, rewarding balance and rubber-shoe grip above all else. Crack climbs split vertical faces and require the body to be wedged inside the rock itself. Face climbs are blank vertical walls where the holds may be barely large enough for a fingertip. Overhanging routes and roofs defy gravity in both directions, forcing climbers to hang from the wall while simultaneously pulling themselves upward. The hardest modern sport climbing routes, such as Action Directe in Germany and Silence in Norway, combine overhanging terrain with movements so explosive the climber must jump between holds.

• 4. Bouldering, Pitches, and Big Walls

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  Length divides rock climbing into three distinct disciplines, each with its own logic and equipment demands. Bouldering routes top out at around 5 m, and the only protection is a foam crash pad placed on the ground. The problems tend to be brutally technical, often resolved in a handful of moves. Highball bouldering pushes that height limit considerably higher, into territory where a fall becomes genuinely dangerous; notable highballs include Livin' Large and The Process.

  Single-pitch climbing covers routes from bouldering height up to roughly a full rope length, which is the most common format in lead climbing worldwide. Nearly all major free climbing grade milestones have been set on single-pitch routes, including Adam Ondra's 2017 ascent of Silence in Norway, which carried the hardest redpoint grade for men as of August 2025.

  Multi-pitch and big wall climbing represent a different world entirely. The climbers must construct belay anchors part-way up the wall, hang from the face in a process called a hanging belay, and may spend days or even weeks on a single route. The Nose on El Capitan is the most famous big wall route in the world, over 1000 m tall. Tommy Caldwell and Kevin Jorgeson's 2015 free ascent of The Dawn Wall on El Capitan set the hardest multi-pitch free climbing grade for men at that time, a milestone that became a Netflix documentary.

• 5. The Fight Over Protection

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  How a climber protects themselves on the way up has been the single most contentious ethical question in the sport's history. In 1911, Austrian climber Paul Preuss published a series of essays in the German Alpine Journal that launched what became known as the Mauerhakenstreit, or piton dispute. Preuss argued that the piton was an emergency aid only and that climbers should progress by fair means, using only the rock itself. His sixth rule was direct: the piton is an emergency aid and not the basis of a system of mountaineering.

  Decades later, the opposite approach reached its extreme. In 1958, a team led by Warren Harding made the first ascent of The Nose on El Capitan over 47 days, hammering in 600 pitons and 125 bolts. The ascent was celebrated worldwide and condemned in equal measure. By 1972, big wall pioneers Yvon Chouinard and Tom Frost published an essay calling for an end to hammer-intensive aid climbing in favor of clean, hammerless techniques that left the rock intact.

  The arrival of bolted sport climbing in the 1980s opened a new front. French climbers in Buoux and Verdon drilled bolts into blank faces that had no cracks for traditional protection, making routes possible that could never have been climbed any other way. Reinhold Messner had anticipated the debate in a 1971 essay called The Murder of the Impossible, writing of climbers who drilled their way up faces: "he carries his courage in his rucksack, in the form of bolts and equipment." Through the 1980s and 1990s in the United States, arguments over bolts on traditional routes escalated into what climbers called the bolt wars, with activists physically removing in-place protection from routes they considered bolt-free territory. The debate never fully closed. As recently as 2022, a survey by Climbing magazine found that most climbers opposed manufacturing holds on outdoor public land routes but drew a meaningful distinction around cleaning and repairing broken holds.

• 6. The Rise of Competition and the Olympics

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  In 1964, a climbing wall built in a corridor at Leeds University began turning out students who, having trained entirely indoors, could climb some of the hardest routes in Britain when they first ventured outdoors. That wall was an early sign of what competition climbing would eventually become. With the spread of bolted sport climbing in the 1980s, lead climbing competitions on indoor artificial walls grew rapidly popular. In 1988, the Union Internationale des Associations d'Alpinisme (UIAA) created the rules and structures to govern competition climbing formally. Bouldering and speed climbing were added as competition events in 1998. In 2007, the International Federation of Sport Climbing (IFSC) took over governance, running the annual Climbing World Cup and the biennial Climbing World Championships.

  In 2016, the IOC announced that competition climbing would be a medal event at the 2020 Summer Olympics, a watershed moment for a sport that had spent a century arguing about whether competition was appropriate at all. Speed climbing runs on a standardized wall where all records are directly comparable. Competition bouldering rewards the number of problems completed and the number of attempts required, with an emphasis on dynamic, explosive movement. The women's walls at the 2024 Olympics were graded up to a specific lead difficulty level and a specific bouldering difficulty, both measurable against the same scale used for outdoor natural routes.

  Indoor climbing has now developed to the point where the MoonBoard climbing wall offers a grid of 200 holds that can be climbed in more than 50,000 distinct sequences, with sequences graded by an online community of users. Some of the world's leading climbers have spent their entire careers training and competing on artificial walls, never regularly engaging with the outdoor rock that generated the sport in the first place.

• 7. Grade Milestones and the Gender Gap

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  In 2017, Czech climber Adam Ondra described the crux of his new route Silence in the following terms: "Then comes the crux boulder problem, 10 moves of 8C. And when I say 8C boulder problem, I really mean it." He went on to calculate that linking those boulder-grade sections together produced a route at the top of the entire sport climbing grade scale. Silence in Norway thus became the hardest redpoint for men in single-pitch climbing, a title it held at least through August 2025.

  Grade milestones have been set and then surpassed in every discipline. For women's single-pitch sport climbing, Brooke Raboutou made the first ascent of Excalibur in 2025, setting the women's hardest redpoint. For women's onsight, Laura Rogora climbed Ultimate Sacrifice in 2025. In traditional climbing, Beth Rodden freed Meltdown in 2008, setting a benchmark the source notes fully closed the gender gap in that discipline. In bouldering, Nalle Hukkataival set the men's hardest grade on Burden of Dreams in 2016; Katie Lamb matched the women's highest mark on The Dark Side in 2025.

  Scientists have noted that the gap between the highest male and female grades across all climbing types is now only one or two grade levels, a situation the source attributes to research suggesting it may have an evolutionary origin. The closing of that gap is one of the more striking patterns in modern climbing history, and it has occurred at the same time as competition climbing has moved to center stage, meaning the full range of grade milestones is now visible to the broadest audience the sport has ever had. Alex Honnold's 2017 free solo of Freerider on El Capitan, which became the 2018 Oscar-winning film Free Solo, brought that visibility to a wider public still.