I'm about 8-10 hours south of dallas, depending how you drive and how brave you are down I35. In the Dallas area though, you have one indoor track for TC racing at the mall, then there is a track abit west in Abilene, and I know thornehill is near there, there is also suppose to be one down in copperas cove area near ft hood ( now known as Ft Chavos.... LAME !!!) .
But I am in the very southern tip of Texas in the Rio Grande Valley, in a town called Alamo, and to race down here at 95% of the oval / offroad tracks, You need to reside in an 55+ rv park or community. There is however a Local Offroad 1/8 scale privately owned track that a guy runs races about every other week that is super nice. Then one of the hobby shops has a small 1/16 Losi Mini B track.