Welcome! I'm in the Saint Louis area as well and I've got a billet JKU :thumb:
There are a few places around, but most of them are 1.5 hours or so away.
Washita in Farmington, MO
-Awesome rock crawling but only open to select group sponsored runs. Check Midwest Jeep Thing for details.
Letz Go Nutz in Fulton, MO
Sayersbrooke Bison Ranch
- Also only open to select events.
Flat Nasty
Moonlight
Southern Missouri Offroad Ranch SMORR near Springfield, MO
- Supposed to be one of the top parks in the Midwest, but I haven't made it there yet.