lensman:
Where does So Cal start? South of Santa Barbara?
Personally, I take the top of San Bernardino County and draw a line West, so I include Kern and San Luis Obispo. Ventura (and Oxnard)'s pretty much South, and Santa Barbara is mostly West of them. Personally, I'm not so sure if Imperial should count as Southern CA -- I'm facetiously saying that because who lives in Imperial County? It's mostly uninhabited land.