Continuously fun moves on good solid rock that's not too sharp. Pro by the hard moves but some runouts on easier ground. At the top, there is a section where there are some non-trivial, harder if shorter than 5'6", moves above and around the corner from the 7th bolt.
Easy for the grade, crux at the 2nd bolt.
Location
On the far right side of Spiney Ridge, just before you turn the corner and it becomes the New Gym, there is a concentration of routes. The most prominent of these is Corrugation Corner and obvious Offwidth / Chimney which is (thankfully) unbolted. Cornerstone is two bolted routes left of this.