Aguanga is just over the mountain from Palm Springs or best reached from Temecula SE on HY 79. This was taken at the entrance to the Rancho California RV Resort during our visit.
After a couple of nights of experimentation, this was the third try at star trails. We found a nice foreground, looking North and started shooting 126 exposures for 1 Hour and 17 minutes using 30 second exposures. These were combined using software Startrails.exe.