There are 2 places out by Sprageville, Ia. River Ridge Trails, a 10 mile course overlooking the Maquoketa River in Spragueville Its open from 9am to dusk at $10 per person. He also has some cabins for overnighting. 563-357-3784, ask for Steve. Address is 34580 100th Street, Spragueville, IA
The other is a farm that was flooded back in 2012, by the Maquoketa River, The DNR condemned it from farming, due to sand and silt issues. So he made a ATV park out of it. I have been to this one, its rough. but fun. Lots of gravel roads to get to it. It winds down by the Maquoketa River also. Has lots of trails carved out of the woods, creeks to cross, a nice flat mud run and a speed run in one of the old meadows. Its owned by a guy I know well, we lived on a farm not far from his when we were kids. If you have a tent, he will let you camp by the river and fish the Maquoketa, if you have a fishing license. $10 per day, per rider. Daylight hours only. At night, you will get lost! Kenny Hansen, Hansen's Hallows- 41324 82nd St, Spragueville, IA 52074
heres a video.
We were out there last fall. Its an absolute riot. We went on a Monday and had the whole place to ourselves. He is slowly opening the trails to UTV's but we had little problems getting through. My neighbor took his 2 day old Ranger. Got stuck in the mudpit, I had to winch him out, 3 times. He told us next time to bring a gas axe and open up whatever we want, to make more trails or easier access for UTV's.
I thought I had his phone #, but must not have saved it. I'll get it and post it....