We're in Chattanooga, TN, staying with some long-time friends. Because of where they live, running on the roads is not a great option -- the roads are fairly narrow and very curvy. But, our friends live near Harrison State Park and there is a 4.5 mile trail that goes through the woods and along the shoreline of the lake. It's a nice trail for running but, because Chattanooga is on the western edge of the Eastern Time Zone, it's too dark to run on the trail until about 7:10 am (I wasn't interested in tripping over the tree roots) -- even then, the first 10-15 minutes are a little tedious.
I could get used to running on trails. No worries about traffic, great scenery (once it was light enough), great variety of environment. A great big THANK YOU to the state of Tennessee for providing this trail and for measuring it for the runners/walkers.