Red Sentinel, Southwest Dihedral. The fourth route on this slender pinnacle was climbed July 27 by Dave Ingalls, Charles Bookman, and Roy Kligfield. After the standard approach from the south, the overhanging inside corner on the southwest side was started by an F6 pitch to a cave. The next difficult lead began horizontally right via delicate balance from the cave. Hand traverses led to a vertical aid crack leading up to the dihedral. From a sling belay in the dihedral A3 nailing led onto an exposed face where unprotected F7 climbing took the party to the summit ridgelet. NCCS II, F7, A3.