Rock climbing is an activity in which participants climb up, down or across natural rock formations or artificial rock walls. The goal is to reach the summit of a formation or the endpoint of a usually pre-defined route without falling. Due to the length and extended endurance required and because accidents are more likely to happen on the descent than the ascent, rock climbers do not usually climb back down the route. It is very rare for a climber to down-climb, especially on the larger multiple pitches. Rock climbing is a physically and mentally demanding sport, one that often tests a climber’s strength, endurance, agility and balance along with mental control.