This scramble is actually just below the Angel's Wings. From the end of N Shanahan Trail, follow the Mesa Trail south until a big open meadow is west of you. From here, there are good views of the rock. Wander up through the meadow and you may find a faint path through the upper bits of Shanahan Canyon. Stray southwest as you near the top of the canyon and you will find the rock. The bottom third is typical easy flatiron paddling, at a slightly lower angle than normal. The middle third is walking through trees, and then the upper third is a bit steeper. Rossiter's book says it's about 1000' of climbing. The trickiest bit is at the top, climb a wide crack to the summit. Downclimb back about 80' and exit south. I walked off to the north, since my dog found her way up that side. A good rest day adventure solo.
Eds. this was originally entered back in 2002 as a route under Angel's Wings, which was inaccurate. An MP.com user noted this confusion and this entry, originally submitted by Anonymous Coward, is simply transformed into a route entry and keeps the original submitter's moniker preserved. However, some confusion may result from this, so this explanation is inserted here.
Not much, probably leave the rope at home.