Tennessee State Route 338 runs east-west across Northern Sevier County. It runs from U.S. Rt. 411/441; Tennessee 35/71, at Seymour, to Tennessee State Route 139, west of Danridge. TN St Rt 338 passes through the following towns in Sevier County. Seymour Boyds Creek Catlettsburg Alder Branch TN St Rt 338 is multi-plexed in Sevier County. Tennessee State Route 66, near Catlettsburg.