Crack climbing is the technique and process of ascending various sized cracks or fissures that split rock faces. Progress is made by jammig or wedging a climber’s fingers, hands, arms, feet, and legs into the crack, depending on its width. Cracks are often described by the appendage used to climb it, such as a hand crack, fist crack, or finger crack. Wide cracks are called off-width cracks and chimneys.
In February 2012, two British climbers were the first to scale a 160 feet (49 m) crack in Canyonlands National Park after spending two years training specifically for the climb.