Every year they open the gate and allow jeeps, ATV, and bikes access to Bingham Mtn in Jackson Co. There's no charge or any real organization, they just leave the gate open at the end of CR 106 that runs to the west of Trenton.
I've only been a mile or so up the mtn, so I can't tell you a lot about the trails/roads. I know there are several areas where the ATV play under power lines. There will be rock crawlers there too. I may take the ATV up and see what this is about this year.
You can look on youtube for Bingham Mtn in Jackson, Co. Also search Coalmine Mtn in Madison Co.
If you have any questions, I'll be glad to answer or find the answer for them. I live within a half mile of the dirt and have plenty room for bamarides members to park.