Tip: “Open in Google Maps” navigates turn-by-turn on your phone; GPX works in Gaia, OnX & similar apps.
41.9 mi
Distance
56 min
Drive time
Spirited
Difficulty
Checkpoints
- 1Mountain City, TN
- 2Shady Valley
- 3Bristol, TN
Shady Valley's three mountainsSandy Gap · 3,862 ftIron & Holston Mountain curves
US-421 through Shady Valley — known to enthusiasts as 'The Snake' — crosses three mountains with aggressively curvy, elevation-changing sections between Mountain City and Holston Valley. One of the most popular driving roads in upper East Tennessee.