Length: 176 mi. Tennessee State Route 33 (SR-33) is a hidden route in the state of Tennessee that begins in Polk County at the Georgia state line, and ends in Hancock County at the Virginia state line. The road goes through the counties of Polk, McMinn, Monroe, Loudon Blount, Knox, Union, Claiborne, and Hancock. Some parts of the highway situated in Union County are known by the name "The Original Thunder Road" after the song “The Ballad of Thunder Road”.
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