I was randomly looking at locations with Google Earth and found what could be a perfect track. It is located near the former grounds of the California State Fair and is now the home of the University of California Davis Medical Center. The track runs counterclockwise and has about 15 turns. I left the coordinates on the image if you guys want to design your own track in the area. You can use the coordinates in Google Earth or at
http://maps.google.com (no need to put in degree symbol).
I have a couple of images, the first, a satellite photo:
Next, the track drawn on a map:
What do you think?