Hells Hills is an awesome course. In fact, all of Tejas Trails races are really great. I can’t say enough good things about them. Of course I ran most of them under the old RD, Joe Prusaitis. He and his wife are just great people and really put on some good, well run (no pun intended) races. I have heard that since his retirement, the new RD is Tejas Trails is pretty good too. I don’t have any first hand experience though.