Fontana. Home of race tracks, meth labs, smog, great hole-in-the wall Mexican restaurants, and one fine skatepark. Personally, I think Chino is better, and since I gave Chino an 8, Fontana should really be an 8-minus. Go cry me a river if you have any issues with that.
Pros - opens early, lights for night sessions, unsupervised, some of the best concrete finish work in SoCal, the clover bowl is speedy fast and it has lots of workable lines, and you're bound to see some of the Sacrifice crew there
Cons - stupid waste of money fingerboard park, pads required, no pool coping, the intermediate bowls are simply a waste of concrete, and it gets a little hot in the summer.
Overall, the park has some shortcomings, but I still think that the clover is one of the best bowls in SoCal (even though it's too shallow for most rippers).
For you out of town folks, the Fontana-Upland-Chino trifecta should not be missed.