This just in, from a press release issued by FastrackRiders:

FastrackRiders apologizes for the short notice, but there has been a change of track courses. Fastrack will NOT be running on the AMA track at California Speedway August 7th and 8th, and instead will be running on the infield course. If you are signed up for either Saturday or Sunday, you are welcome to call us at 949-574-9883 to cancel or tell us that you will still be coming to the trackday or reschedule for another one of our events. The cost is less for the infield course and you will be refunded the difference. We will have two garages available to us, normally one comes with the infield course. Sorry for the inconvenience.