Start up a thin crack (crux) to a small overhang. Step over the overhang to wider cracks and slabbing above. I enjoyed the bottom half. The upper half is a little dirty. Not a bad climb if the popular climbs are busy.
Location
Scramble up the boulders to the east end of the Perch (past Left Handed Jew). Locate a semi circular crack (this route is Circle Jerk). Lack Crack starts up the right side of Circle Jerk. You can either start in a hole below the crack or walk around a boulder to start at the crack. To descend scramble up, walk right then scramble down boulders to your start.
Protection
Standard Rack plus #4 & #5 cams to sew it up. Small gear will work for a belay/top rope anchor.