Why is climbing allowed on the Tower? Devils Tower boasts a climbing history that dates back to 1893 when it was first climbed by two local ranchers using a wooden ladder. Climbers from all over the world consider Devils Tower to be a unique and premier climbing area. Currently, about 5000-6000 visiting climbers come to Devils Tower each year. Although early rock climbing techniques have left an indelible (though slight) scar, contemporary rock climbers leave little trace of their ascent. The modern technical equipment that is used for safety is designed to be efficient, removable, and non-damaging. Pitons, the steel “pegs” that were historically hammered into cracks, have almost exclusively been retired from use. The National Park Service (NPS) considers rock climbing a legitimate recreational activity at Devils Tower.