Where in Austin?

[BigGreenMachine]

Hi everybody, my first post here. I'm using the same name over on the 3wheelerworld forums. I've got an 85 Tecate that I'm restoring with quite a few mods. I am currently on vacation in Austin all the way from Canada and right now am fighting for a very nice 85 Tecate on eBay.

I'm looking for a place to ride in or very near Austin Texas because when I get this bike I'll need somewhere to ride. I've spotted a nice quarry about 10 minutes from Pflugerville but it would be illegal. Anybody know any trails I can use?