I actually used to race there, its the HobbyTownUSA in Tucson, Arizona, good place back in the day when the offroad track was larger. They banned 1/8 scales from their track, and put in the oval/figure 8 and made the offroad track smaller and put the drivers stand between the two, but since the banning of 1/8 scale cars from their track I really have no reason to go there anymore.

I've been going there for the hobby shop for so many years now though they know me on a first name basis.
EDIT: I know its nitros, but just to give you an idea of what their track used to be -
[YOUTUBE]http://www.youtube.com/watch?v=hVkmiY8lDmU[/YOUTUBE]
http://www.youtube.com/watch?v=hVkmiY8lDmU