The Kingsport Greenbelt runs 8 miles along the Holston River and Reedy Creek through the city of Kingsport. It is touted as both a historic and fitness trail, passing by Civil War sites, historic homes, landmarks, and bridges and other sites of interest amid river and mountain scenery. Each of the four sections along the greenbelt offer unique things to see and do.
You can access the Kingsport Greenbelt trail from numerous places along its route. View the local map
for more information (http://kingsportgreenbelt.com/pdffiles/greenbeltmap.PDF).
Really a great urban biking trail, all asphalt. Mostly smooth but rough in places and bombarded by Geese. A good place to bike in the day, but gets crowded in the late evenings with joggers and walkers.