I think it's one of the most diverse places to ride in MO. there's a little bit of every type of off-road riding out there except for mx of course.
The real diversity of the park comes out when you race an enduro out there. I believe alot of the Leadbelt National Enduro was on land that is not accessable or available to the usual park visitor. But even still, what is available can be very cool. The race was this past weekend (i was in it) there was a bit of everything imagineable;
In 5 miles of trail you can go through sand whoops, hydroplane out on the river, go up big nasty rocky hills, go along the side of a hill with roots trying to pull you down, blast down a wide roller coaster feeling 4 wheeler trail with huge berms, trials ride down big rocky creek beds, jump over big logs, and when its all over, go take a dip in the lake at the camp ground on the flats.
near virgin 100 yard hills strewn with loose softball sized rocks (talk about a killer, i had to stop and rest mid way up it after dumping the bike twice when the trail went up it for a second time at mile 94! it was killing me and I'm an A-B rider!)
killer sand whoops coming through the river bottom that made me think of the daytona supercross
wild and crazy fast 4 wheeler trails with huge berms and roller coaster style hills and valley's (way cool section)
a killer water fall section where you head down a (usually) dry creek that has about 10 water falls in it, they gradually get bigger and bigger starting at about 2 feet with the last two being 4-5 feet tall! that section was really cool and a spectator point
a few big log crossings some going UP hill!
one section had us following a pea gravel filled creek that was cluttered with sections of very slick limestone and boulders and had a couple log crossings in it.
There were a few really cool pine tree woods sections with rolling hills, very light under growth and lots of little logs and roots crossing the trail. there were also times that they took you right down next to a small lake/pond. the section was giving me flashbacks of racing in louisana!
there was one section, that I can only assume was a jeep or very large 4 wheeler trail it meandered around on a hill side cross crossing back and forth up the face of the hill and then back down over the course of a half a mile. it was very cool with lots of little ledges that had you using the cracks in them as small ruts to smooth out the hill.
even went through an enormous drainage pipe under the roadway!