I worked for Hewlett Packard years ago while living in Orange County, CA. The GM proving grounds near Queen Creak was my customer, and every time I went down that way I would stop into Magma Engineering and pick up some of their blue lube.
I asked the guys there where they went shooting and they told me to follow Ocotillo east towards Rittenhouse. There was this rough country north of the road where everybody used to go blasting.
Nowadays this same place is Crismon Heights or thereabouts. When I move here 5 years ago and made a trip to Magma E, I just could not believe how much the area had changed.