BROWN COUNTY PARK TRAILS
I'm able to recommend the mountain bike trails in Brown County State Park as some of the best I've ever ridden. They are not technically too difficult (at least, the ones I've thus far ridden), but the up and down terrain is challenging and the setting is just plain beautiful.
Marketing tip for bicycle shop proprietors: there is no bike shop in or around Nashville, Indiana, and now you have not only the Gnaw Bone trails but an expanding system of trails within in BCSP that will become well known and used. The time is ripe for a shop featuring mountain bike sales and repair. John T. (in photo) broke a chain on the trail and there was no bike repair within 20 miles; fortunately, the local hardware store carried chains and chain repair tools.