I began from 29S18 (labelled on some maps as an extension of Pine Mountain Rd and some maps as Queen Bee Rd). I drove up 29S18 from Pozo Rd in a 2wd vehicle easily, and probably could have continued driving up the first couple miles of Pine Mtn Trail to Castle Crags Trail. I split off at Castle Crags Trail, but ran into 2 dirt bikers heading up the other way toward Las Chiches. No water on the route, expect temperatures to be similar or higher than the forecast in Pozo. There is a register for the trail at (35.32599, -120.23948) that is sorely in need of a new notebook. If you're into geology, you'll love the views from this trail - it looks like Pinnacles NP from afar but up close you can see all the details in the sedimentary conglomerates and the wind erosion has created some interesting layering effects. See my review for Castle Crags Trail as well.