I'm hoping for Sonoma

, the track I found is a full course and not the one ran for NASCAR and there's a slight AI problem in one of the turns which always causes them to slide off the track. A few months ago, there was a posting by the ISI track team for a Martinville's mock track and Bristol mock track coming out but I'm not sure when those will be released. The Bristol mock is called "Fallston Motor Speedway" and the Martinsville mock I didn't see a name. These tracks can be seen from ISI Track team's twitter
here and
here. I think they were testing the multiple pit lanes for the Fallston one and they may be why it's taking some time to release that.
[EDIT] Oops I guess they're called rF2 Track Team now.