Rainbow Mountain (Mount Charleston), Solar Plexus Route. The route keeps well east of the great arch on the south face of the Solar Wall, south-facing and often warm in the desert sun. It was virtually all face-climbing, much on small holds on solid sandstone. The blankest portion of the climb just barely works out, with the key traverse possible only because of the soundness of the mini-holds. The climb was done on March 3 by Alan Bartlett, Stan Molenski and me. NCCS III, F8.