I watched some edurocross at the National Western complex a few years ago. The amateur races are free, the the pro races have a spectator entry fee. It is very entertaining to watch, the obstacles are huge. Some guys fly over them, some guys fall down them. I think the races were around Halloween in the past.
'03 KTM 450EXC
"If you know what you're doing, then you aren't learning anything." - A. Lincoln