I live in Smyrna (close to the middle school) and do rides from home all the time. It's not that difficult to find a great ride anywhere from 25 to 100 miles. I did 2 centuries this month from home, one out and back, another a loop. If you would like, I can e-mail you some route sheets and you can get a good county/city map from Smyrna city hall for about $3.00.
I should be done with my full scale Murfreesboro Topo map in a few days, and I will post a link as soon as it is done. It will have the area near you as well. Roads will be labeled.