adventure alpine-climbing alpinism american-climber arts author big-wall-climbing biographies california camping climbing composers conservationist el-capitan explorers extreme-sports famous first-ascents gear-selection hiking ice-climbing iconic influence inspiration inspiration. instructional leaders legend legendary literature memoirs mountain-rescue mountaineering musicians notablepeople outdoor outdoor-adventure outdoors pioneer rich risk-management rock-climbing rockclimbing rope-systems route-planning royal-robbins safety-techniques sierra-nevada sports summiting survival-skills technical-skills training travel travelers unitedstates weather-forecasting west wilderness-exploration yosemite yosemite-valley