Found at the end of the Black Mountain Road, the boulders here are distributed across the campground. Most of the developed problems are found amongst the tall boulders around and near campsite 20. The downside to this area is the abundant number of people enjoying the great outdoors.
The parking situation is limited. You will either need an adventure pass and park such that you're not blocking any of the roads / trails OR pay the $10 dollars to stay in a campsite. Campsite reservations and an iron ranger are located at the entrance to the campsite.
Please take care not to trample through people's campsites (easier said than done) without asking for permission. On crowded weekends, more often than not, tents are pitched unknowingly under choice problems or even the downclimbs. Scope out the scene before jumping on a problem like a kid in a candy store. And finally don't forget to scope out the downclimb - more often than not, you're upclimbing the downclimb...
Getting There
Follow the signs to Boulder Basin Campground. Stop the car when you arrive. Approaches to most climbs are anywhere between 5 seconds and 5 minutes.
The fine for not buying the Adventure Pass is $5 (the same as the cost of the pass itself) and carries no penalties for not paying it (to my knowledge).