Since this is Portland I'm willing to wager that plenty of us are California natives. This San Diego native is busting over the discovery of 2 San Diego institutions that have somehow landed in the area:
1) Fidel's - 3 locations: Solana Beach, CA, Carlsbad, CA, and Bingen, WA???? Right across from Hood River, this is just as good as the Fidel's in San Diego (opened by the guy's son). This was our family mexican place growing up. I can't recommend the tacos (hard) and chili rellenos enough.
2) Roberto's - anyone from San Diego should be tickled to know that there is a Roberto's in Salem and one in Bend. I've only been to the former, but I'd rate it as 85% of the San Diego chain. Same great rolled tacos (though cheese is not cotija) and the carne asada is tremendous. Tricky to find, but worth the trip.