Originally Posted by z-u-later

The track OP is talking about is called "The Driveway." It's actually a kart track, not a road course. I have driven there several times during autocross events hosted by Spokes, the local Austin autocross club. There's talk about enlarging the track but it's not really built for a road course.

However, there's a "real" road course opening up in San Marcos soon. It's called the Harris Hill Road (H2R). It is a private road course, which means you must buy a membership to be able to use the track. I will post some more information here as soon as I get a tour of the track and possibly get a lap or two on the course.