The first bolted line up hill from the The Altar starts on a small platform. Arch Crack follows an arching crack for 40 feet and then dumps out onto a short, thin headwall for 20 more feet. This line kicked up interesting moves in the crack at 5.9/5.10 and then switched gears entirely pulling out of the crack (5.11a). Largely very good stone, although quite thin at the top, coupled with interesting climbing make Arch Crack a very worthy endeavour. Grade was closer to 5.11a than 11b.
Great climb. The crack is sustained, yet typical .9/.10 sport climbing. If you are struggling to make the clips, your not in the right place. The transition to the upper face is AWASOME. Great feet and tiny fingers.