Tennessee State Route 68 runs north-south in Eastern Polk County. It goes from the Georiga/Tennessee State Line to the Monroe/Polk County Line. TN St Rt 68 passes through the following towns in Polk County. Copperhill Ducktown Dogtown Harbuck Tutletown Pine Ridge Farner TN St Rt 68 is not multi-plexed in Polk County. TN St Rt 68 intersects the following highways in Polk County. U.S. Rt. 64, at Ducktown. U.S. Rt. 74, at Ducktown. Tennessee State Route 40, at Ducktown. Tennessee State Route 123, near Farner.