We used to ride at some place that was between Oneida and Jamestown, TN. We have horse friends that live on the Jamestown side of the gorge and we would ride there all the time several years ago. I remember crossing a big old railroad bridge and having to cross a big river to continue on the trails. I do remember the CarHauler trailer that you ride up that @Choogsbro mentioned. I was told it was closed to vehicles and only open to horses now. That Hancock grocery sounds familiar too!!! It was a lot of fun riding there. I remember it was close to a Pickett State park to on the TN side