San Diego County
San Diego County is a region of Southern California.
There are many cities in San Diego County; these are some major ones.
The Coaster commuter train (1-800-262-7837) runs between the North County and downtown San Diego, with stations in Oceanside, Carlsbad, Encinitas, and other towns. The fare is $3.50-$4.75, depending on distance, with discounts for seniors and students as well as for multiride tickets.