Finished the marathon today...first time to run the Cowtown...boy this course is hilly as hell. I was completely spent by mile 22. Had to struggle to finish the rest...it had some good hills, but even when I thought it was "flat", I looked behind me and realized that most of the course is a steady grade uphill. Ugh. I would definitely do the half marathon though. The whole event was very well done and organized...I just don't know about the elevation on the marathon course though. Lol