Used to live downslope from you @ Edwards AFB. Good desert riding on the west and south ends. I rode 12months a year there, single speed to FS/AM stuff. There are some fellas up in Bak-o who ride the oil field trails there...googles check ssfta. They ride weekly, have some races and community building. Good bunch of guys...
Also out in Ridgecrest there are trails near the JuCo.
If you have the means, head down to the Jenson store. Big county park outside there, I cant remember the name, but Jenson sponsors shop rides there all the time.
I was disapointed that there seems to be little-no riding in the Tehachapi area...maybe you can pioneer some trails in the area