Silver Comet Trail, Georgia
The PATH Foundation is a non-profit group dedicated to getting trails developed throughout the state of Georgia.
Georgia Rails Into Trails (GRITS)
GRITS is a non-profit organization based in Polk County, Georgia dedicated to building and maintaining trails in Polk County.
Silver Comet Trail Forum
A group called Team Maniac took over the Trail Forum in 2003 and maintain an active forum about the Silver Comet Trail and the Chief Ladiga Trail. They are not affiliated with TrailExpress.
Trails From Rails
There are many more rail trails like The Silver Comet Trail across the United States. This site is a guide to the best ones, all paved or crushed limestone/gravel.