Rappelling in J Tree! Most of the rock formations in Joshua Tree National Park can be descended via "walk off", which in most cases is a scramble off the backside of the rock on the easiest path down. When the easiest way is hard enough that's when you have to rappel. Let gravity take you down and "rap off". Most rock formations have rappel anchors with rappel rings. This type of equipment is permanently fixed through bolts and meant for many years of use – a great way to not have to leave your personal gear on the rock when rappelling. Here Emily enjoying her special way down