The Ohio Horseman's Council has chapters in almost all the 88 counties. If not for them, I doubt we would have the trails we do.
I live in the NE section, by Mosquito Lake State Park. There is only 10 miles of trail there. The most beautiful riding is in Southern Ohio. Hills, waterfalls, and beautiful scenery.
Most of the Backcountry Horseman's chapters around here adopt trails for maintenance too. The good benefit of that is you can ride year 'round on trail maintenance, even when they are closed for winter. Just have to bring some tools with you and be prepared to cut. ;~D
I belonged to the Ma horseman's council for a while. It was a really good group.
Where in Ohio are you? It looks like you live near me (sort of) I'm in Geauga County. Would love to find a trail buddy, my husband is not into horses