I think there is more than enough to justify a call. good find!
Thank you all for your responses!
As far as timing goes, I believe it is very plausible that she got into the transient/methamphetamine lifestyle, hooked up with a pimp and/or other people in similar circumstances, and just existed for a few years. There was an unconfirmed sighting of her 8 months after her disappearance that seemed pretty solid she may have been hiding from a pimp and quickly left with another woman. Heres a site I found that had some more details about that sighting:
http://www.unsolved.com/ajaxfiles/mis_star_palumbo.htm
Pacifica is only 230 miles from Reno, and its a pretty straight shot down major highways. The large cities of Sacramento and San Francisco are in between these two points. I can tell you as a native of the area that theres plenty of drug and criminal activity around, especially meth. Like you all said, if she just kept moving and giving false names if caught, its entirely possible that she made it that far.
Do you think this is strong enough information for me to make a call to the authorities? Like I said before, Ive never done anything like this and want to make sure Im doing the right thing.