Free solo climbing in the context of "Multi-pitch climbing"

Bouldering, less commonly spelled bowldering, is a form of rock climbing that is performed on small rock formations or artificial rock walls without the use of ropes or harnesses. While bouldering can be done without any equipment, most climbers use climbing shoes to help secure footholds, chalk to keep their hands dry and to provide a firmer grip, and bouldering mats to prevent injuries from falls. Unlike free solo climbing, which is also performed without ropes, bouldering problems (the sequence of moves that a climber performs to complete the climb) are usually less than six metres (20 ft) tall. Traverses, which are a form of boulder problem, require the climber to climb horizontally from one end to another. Artificial climbing walls allow boulderers to climb indoors in areas without natural boulders. Bouldering competitions take place in both indoor and outdoor settings.

The sport was originally a method of training for roped climbs and mountaineering, so climbers could practice specific moves at a safe distance from the ground. Additionally, the sport served to build stamina and increase finger strength. During the 20th century, bouldering evolved into a separate discipline. Individual problems are assigned ratings based on difficulty. Although there have been various rating systems used throughout the history of bouldering, modern problems usually use either the V-scale or the Fontainebleau scale.

El Capitan (Spanish: El Capitán; lit. 'the Captain') is a vertical rock formation in Yosemite National Park, on the north side of Yosemite Valley, near its western end. The granite monolith is about 3,000 feet (914 m) from base to summit along its tallest face and is a world-famous location for big wall climbing, including the disciplines of aid climbing, free climbing, and more recently for free solo climbing.

The top of El Capitan can be reached by hiking out of Yosemite Valley on the trail next to Yosemite Falls, then proceeding west. For climbers, the challenge is to climb up the sheer granite face. There are many named climbing routes, all of them arduous, including Iron Hawk and Sea of Dreams.

Free climbing is a form of rock climbing in which the climber can use their rock-climbing equipment only for their protection, not as an artificial aid to help them in ascending a climbing route. Free climbing, therefore, cannot use any of the mechanical tools that are widely used in aid climbing to help the climber overcome the obstacles they encounter while ascending a route (e.g. aiders or skyhooks). The development of free climbing was a transformational moment in the history of rock climbing, including the concept and definition of what determined a first free ascent (or FFA) of a climbing route by a climber.

Free climbing can be performed in several different types of rock-climbing formats that vary with the type of climbing protection that the free-climber used. For example, free climbing can be done as lead climbing in either a traditional climbing (temporary and removable climbing protection) or a sport climbing style (permanently fixed in-situ climbing protection). Free climbing can also be performed as bouldering or as free solo climbing (no climbing protection whatsoever). Free climbing is sometimes misunderstood as relating only to the formats of free-solo climbing or of solo climbing, which is not correct.