Do freeway on ramps count???ha ha. I have to travel about an hour into the San Diego Mountains to find good twisty roads.
One of the Cali riders here, I think it was Eddiemon wrecked through one of those Freeway U turn style merge ramps. Fun but not a good place to wreck when trying to merge on a busy freeway. I take them at a good angle most the time and sliped on some oil, I almost lost control but got very lucky. I would have gone into and over the guard rail at that time. You have some decent tracks in So. Cal... I would check those out.