We watched them for hours in Lukenbach, TX this past October. It was an awesome thing to watch. There were 5 different classes of riders on the tracks at the same time. There were different paths through the obstacles for each class.
There were even some small kids on electric trials bikes. They were just trying to make it around the course on the easiest path, but they were very cool to watch.
I don't have the skill set tho....
Hay

Jimmyt