We rode Wilmuth Creek a couple of weeks ago. It was as good as it ever is. There are a couple of switchbacks so don't try to navigate downhill at 30 mph. Haven't been on Sugar Tree for a few years but it used to be maintained about the same as Wilmuth Creek.
Sugar Tree Knob is tar and chip and a good ride from 53 past the Sugar Tree Knob Church of Christ. Be sure to stop there and see the Cemetery and use the very nice outhouse. As the road goes east from there it becomes the N Sht. Mt. Road and is gravel not suitable for road bikes.
Old folks will recall the wonderful rides od yesteryear to John Sanborn's home on Short Mtn. He's in MTSU Dept. of Social Work: 898-2685; jsanborn@mtsu.edu