Go to charting outcomes.
Look at the top 10% of Step 1 and Step 2 scores.
If you're not in that group then you statistically are unlikely to match at a top program in California (UCSF, Stanford). Even if you are then it is still a crap shoot.
If you are in the "above average" category then you may have a chance at matching if you have a compelling reason and mutually beneficial connection with above average" programs in California (UCLA, UCSD).
If you are "average" then you must do some work to stand out from your cohorts - be interesting, have a fantastic interview, tell a convincing story, bring something extra to the table. Think UCI, UCD, LL, USC.
Residency is what you make of it. Work hard. Don't complain. Be professional. All places offer something of value. Sometimes it'll be presented neatly to you and other times you gotta work a little more for it.
Lots of fantastic programs in CA. Lots of fantastic programs outside CA.