http://www.thunderhill.com/
It's grown since I saw it last. I flagged the opening event. The course and paddocks were done, but not much else. The parking for everything but the race cars was dirt. The first night there was a pretty bad windstorm. It knocked over several porta-potties. A number of people who had tents loaded every ice chest they had inside to keep the tent from blowing away.
The next day was clear and calm, though. The event was mostly an opening celebration. There was a vintage/touring event in addition to the more usual races. The equipment truck was decked out with a pair of cow horns on the front and a cow bell, and the horn moo'd. They also decorated the entrance off the track into the pit lane with the tackiest pink flamingos they could find stuck into hay bales. It was quite a weekend.
I don't think I did much more than a year after that. Work and other things in life kinda demanded my time, and I never got back to it.