The Arabia Mountain Path is a paved, mixed-use path running 18.6 miles from the Mall at Stonecrest Trailhead to Monastery of the Holy Spirit, outside of Atlanta, GA.  There are several spurs as well.

Robert Rives posted the route:

The Neuse River Trail, as described on Wikipedia:

The Silver Comet Trail is a 61.5 mile rail trail from Smyrna, GA, to the GA-AL State Line.  It is part of a 95.5-mile-long continuous trail from Atlanta to Anniston.

Erich Hellstrom attempted to run the Silver Comet in August 2017, but didn't complete the route.  He posted as follows: