how do i know about any kind of contests that are being held in california?

You will need to be deligent in your search. You don't say where you are but you may want to get involved with local cake club chapters, ICES etc.

I would also ask suppliers and others I know. The local fairs also have contest.

HTH

THanks for all the help, really appreciate it

Sometimes they're posted in the "Events" forum.
http://cakecentral.com/modules.php?name=Forums&file=viewforum&f=15