Randy,
I believe the Green Flag Driving association has one day a year at Thunderhill and also Laguna Seca. I have the entry form here for Button Willow Raceway.
They list new rules as the helmets have to be Snell 96 or higher and Nomex gloves are now reqired of all drivers. They are more of a group for new people to get into and learn about the tracks and cars than any actual racing. And they may have changed to now require complete Nomex drivers suites as I don't have the latest rules.
Ron
