This crack varies from hands to fists and hosts some great hand jamming and is sustained from the start until you clip the anchors. The crack is solid as bay area sandstone gets but the rock on the outside of the crack is a bit loose. So looking for foot and hand holds outside of the crack is not a real great option. Watch for Poison oak at the base. It has been wiped out several times but comes back every few years.
Its an obvious crack on the lowest tier facing downhill. You can spot it form the bottom of the canyon if you know where to look. If you want to top rope it, climb around the back on the right side pulling a move over a large chock stone. Careful this chockstone is loose but I doubt anyone could physically pull it out. You'll find two ring anchors at the top.