More than 100 climbing accidents occur in Yosemite each year; of these, 15-25 parties require a rescue. Climbing in Yosemite has inherent risks and climbers assume complete responsibility for their own safety. The National Park Service does not maintain routes; loose rock and other hazards can exist on any route. Rescue is not a certainty. If you get into difficulties, be prepared to get yourself out of them. Know what to do in any emergency, including injuries, evacuations, unplanned bivouacs, or rapid changes in weather. Safety depends on having the right gear and the right attitude. Practice self-rescue techniques before you need them! Courtesy is an element of safety. Falling rock or gear is a serious hazard. Be careful when climbing above others. Do not create a dangerous situation by passing another party without their consent.