The impressive crack system in the middle of the North face makes up the popular Crimson Crysalis. The Cloud Tower is a long day of climbing...The route itself took us 8 hours, alternating pitches. Rack up to a #3 camelot with doubles of medium to small pieces, a healthy selection of long runners and about 10 quick draws. This can be a cold climb if the wind is blowing. Prepare for a lack of sunshine until you reach the summit (late March). Crymson Crysalis is a very popular climb, as we rappeled through 3 groups on our descent....so if you want the pristine 1st party experience, wake up early, park on highway 159 by the loop exit gate, and be hiking by at least 5 AM...which is one hour before the park opens. The second party to reach the climb were surprised to see us starting the 1st pitch. I've been told Ginger Cracks is a good alternative if you don't want to climb behind another party.