The Grotto 

Although the climbing is excellent, it is worth noting that the grotto reeks of (rodent? bat?) excrement, and is mobbed on weekends.

Better (sport) climbing is to be had at the nearby Gold Wall. You catch a trail closer to the final entrance gate and then bear left on the trail at the fork to gain the base of the crag. Follow the crowds, you can't go wrong ;). But the dumb asses pretending there isn't a weekend gang bang of the area in effect already still don't want this info published?

Too bad, community discussion of the area and appropriate behavior would be more helpful since only those who need a new set of glasses can't see the cat has been out of the bag on that high quality 5.10-13 sport area for about a decade now. Watch your step if you go, you will literally be tripping over hordes of people on the weekend while visiting the worst kept "secret" in NorCal.

At this point, the private property argument holds no water since you literally couldn't fit more people into this area. Everybody who would go there, does already. I will leave it to admins to remove this comment if they deem it necessary, since I will not.