Hey.........have ridden a ton of them. Anytime you're south of Hwy 70, expect rocks........expect them at Park Hills. The Mudders put on a first rate loop. (they do the National Enduro too) If you've ridden there, you know it offers about 1800 acres for riding.........well used trail. For races they open up more of their land, often laced with fresh, tight, hand-cut stuff. Expect a good turnout, some sand, some rocks, some steep uphills, maybe a little mud. Hydrate up.........enjoy.