First Bear Flag.

History trivia : California was once a part of Mexico. Well, before that, they were basically under Spanish rule (that would explain all the Spanish names for cities.. eg : Los Angeles) until Mexico's 'War of Independence' from Spain ended in 1821. California then naturally fell under Mexican rule until 1846 when American settlers revolted and formed the California Republic with the 'bear flag' above.

The California Republic later applied to the United States for protection (bear in mind that they were not part of the United States then) from Mexico. The US was at war (1846-1848) with Mexico then, so the California Republic joined the war under the 'Stars & Stripes' Flag. When the war ended in 1848, Mexico surrendered California to the US. California officially became a state of the US in 1850.

I guess the main reason why i did all this research was because i was curious as to why quite a number of roads/towns/cities in California have Spanish names. If you're interested in reading a more detailed history, visit http://en.wikipedia.org/wiki/History_of_California.