Most excellent, exposure and unclimbed perfect cracks. Many pitches later, we made it to the top shortly before dusk, and searched for a scarce flat spot on the summit, which amazingly still had snow on it despite the warm daytime temperatures. After 3rd classing to the summit the next morning, we began our descent, which, like all Zion descents, proved to have its own brand of desperation and toil. We eventurally exited at an outrageous hanging waterfall which we rappelled down to once again meet the estranged but blessed terra firma. Start on the center crack on the outermost lower buttress of Issac.
Upper route follows the obvious splitter on the upper buttress.
19 pitches for1800 feet of climbing.