Scree and steep or rough terrain may be encountered. Trips in this classification may require additional climbing skills. Basic Mountaineering School graduation or approval of leader is required. Designates peaks of any classification as dangerous. Basic Mountaineering School graduation or approval of leader is required.
Technical trips are open to all qualified climbers.
Trip descriptions give a general idea of ability required. Registration is commonly with the leader, who determines the qualifications needed for the trip. The limits of the levels of difficulty within each hiking and climbing classification are defined as easy, moderate, or difficult by the trip scheduler and leader according to the pace, terrain, and, in the case of rock climbing trips, the Yosemite decimal system, during the season that the trip is scheduled. A backpack must be considered a separate trip classification. Advanced trips are generally over 10 miles on very difficult terrain.