This is route #18 in the book. It is an obvious, vertical, wide crack on low angle rock. There is a bit of lichen and some OW sections.
It is a 10-15 minute walk to climber's right from the trail up. It is a few minutes past Unknown #7 (route 17 in the book).
Bring a standard rack up to OW if you need it. It has a 2 bolt anchor in the black, varnished rock.