Bouldering is a form of free 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 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. In addition, bouldering competitions take place in both indoor and outdoor settings.
The largest outdoor bouldering gym in North America, The Cliffs at DUMBO, is located in Brooklyn Bridge Park.
An indoor bouldering gym
Climber on the Thimble in Custer State Park in South Dakota during the 1960s
A competitor at a Boulder World Cup in 2012
Free climbing is a form of rock climbing in which the climber can only use climbing equipment for climbing protection, but not as an aid to help in their progression in ascending the route. Free climbing, therefore, cannot use any of the tools that are used in aid climbing to help overcome the obstacles encountered while ascending a route. The development of free climbing was an important moment in the history of rock climbing, including the concept and definition of what determined a first free ascent of a route by a climber.
Leading a sport climb
Leading a traditional climb
Free solo climbing
Bouldering