Castle rock is the unappreciated step-brother of the City of Rocks. Just to the North, what it lacks in sheer rock quantity, it makes up for in quality, at least as far as the bouldering goes. But, do keep in mind, 99% of the rock is complete choss. The boulders are basically blockier versions of the Buttermilks, a lot of that crumblier granite that does clean up but just takes a while.
ACCESS IS DELICATE right now. Check with the park service to see what the current state is. I know quite a bit of the North section is off limits for now.
Do you spend a lot of time at Castle Rock? Can’t find what you just climbed in Pebble? Add it to this wiki based guide!
From the South, take I-84 to the second Snowville exit, Exit 5. Turn left at the end of the exit ramp and follow this road until you see signs for City of Rocks. Follow a bunch of dirt roads for about an hour until you see a left turn for the City. (If you get lost on the dirt roads don't worry, they all eventually either lead to a creepy rancher's house or a roundabout way to Almo). Don't take the left, but drive through Almo until you see signs for Castle Rock State Park. Take that left and don't forget to stop and pay the $5 entrance fee.