This rock lies just south of Lost Angel Wall, about 15 yards from the creek. Hike downstream (south) from Lost Angel, on a trail just above the creek. You can also get here by hiking upstream (north) on a trail just above the creek.
Look for the distinctive V-shaped slab which holds the route Mes Amis. Mary Lynn's Slab is the bolt line on the slab to the right.
Mountain Project's determination of some of the classic, most popular, highest rated routes for Water Slabs:
Not climbed often. Follow the bolt line on the right side of Water slabs. Follow the left edge, then turn right up a thin face (lichen abounds just to the left - hug the right side) before hopping onto a third face moving up and left. ...[more]Browse More Classics in CO
Although I very much enjoyed the other waterslab route, this one is longer, more varied in the style of climbing (the other is mostly blank slab where this is slab, awesome arete and jugy face). Led this 2 weekends in a row now, very good route.
Be Careful!! The lefthand anchors (#1) are in a block that is pulling loose. I heard a deep "pop" sound when I waited the anchors in the block to rap and dust came out the right side. There is a fresh crack on the right side of the block where it is splitting. Don't TR the left hand, #1 route. Someone please fix... Don't fall on the last bolt on the right (#2), skip it!. Its in a very loose flake (who bolted a flake?). This was as of 06/15/02.