If you head toward Austin there are some great hill country roads West of Austin all the way down to SA. Bandera & Leakey is always a good ride, I used to do that a lot with friends....Here's a good web site of some of them
http://www.hillcountrycruising.com/
Sorry but our bikes aren't street legal so any weekend not a Track day we are doing MX so we won't be much help in showing you around.