I have a schedule (I hope it is still current) for all California tracks for the year. I updated it about 2 weeks ago so it should still be close.
I made it into a PDF and put it on the website. Here is the link to it:
http://www.dirtmodifiedracer.com/2010CaliforniaTracks.pdfFYI - the gray colors are Fridays, white=Saturday, yellow=Sunday and I think there is one Thursday race.