Your hands and feets are wedged or jammed into a crack to make vertical progress.
Photograph © Stewart M. GreenCrack climbing is the technique and process of ascending various sized cracks or fissures that split rock faces. Progress is made my jamming 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.
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