West Face of Kat Pinnacle. On April 2 Tom Frost and I forced a new route on Kat Pinnacle. This starts on the 110° north face and then follows hairline cracks on the west face to the summit. The entire climb was artificial and included a very difficult “zipper” pitch where we placed a line of knife-blade pitons and “rurp” pitons, made specially for the climb.
Yvon Chouinard, Yosemite Climbing Club