Good thing you like Crits, because that's pretty much all there is out here.
Ok, there are maybe 6 or 7 genuine road races, but they're all early in the season and if you miss them, well... sadness.
The majority of the season is late January through mid-July, typically. From mid-July through August there are fewer races, but there is still racing. It mostly slows down in that time because of the summer temperatures. It all closes in September, where CX picks up through December. MTB racing is pretty much year round, mostly focused on February through August.
Southern California Racing is under this sub-org of the USA Cycling org:
http://scnca.org/Northern California will have more Road Races, and if you love races with a lot of climbing that's also the place to go. They have Road Races, comparatively, all the time.
http://www.ncnca.org/It's a big state, keep in mind that in size Great Britain would cover only a bit more than half of California.
Enjoy your time here, and check out the
Climbs USA thread for some awesome riding tips if you want to just enjoy what we've got instead of riding around in circles.
