# Tennessee State Route 108

State Route 108 (SR 108) is a 61.7-mile-long (99.3 km) state highway in Southeastern and Eastern Middle Tennessee. It connects SR 28 in Whitwell to SR 55 Bus/SR 56/SR 380 in McMinnville.

## Route description
### Marion County

SR 108 begins as a primary highway in Marion County at an intersection with SR 28 in Whitwell. It travels to the north as Main Street into downtown and then turns northeast as Cumberland Drive and leaves Whitwell. It then ascends to the top of the Cumberland Plateau and passes through primarily rural terrain, where it passes through Griffith Creek, until it reaches Grundy County.

### Grundy County

SR 108 continues north through rural terrain until it enters the town of Palmer and passes through its downtown area. It then comes to an intersection with SR 399, where it enters Gruetli-Laager.
SR 108 passes through the city for approximately 6 miles (9.7 km), Before entering Coalmont, where it has an intersection with SR 56 for the first time. Approximately 1 mile (1.6 km) past the SR 56 intersection, it leaves Coalmont and enters rural terrain again, where it comes to an intersection and becomes concurrent with SR 50 and turns back north on SR 50 east. After approximately three miles (4.8 km) of mostly wooded terrain, the highway enters Altamont, where they continue into downtown and come to a second intersection with SR 56, where SR 50 ends and SR 108 becomes concurrent with SR 56 for a mere 184 feet (56 m), where it becomes a secondary highway, before splitting from SR 56 and turning west, leaving Altamont. Just after leaving Altamont, it turns back north and continues on a northerly track through a mix of hills and farmland until it crosses into Warren County.

### Warren County

SR 108 then passes through farmland until it enters Viola, where it intersects and becomes concurrent with SR 127. SR 108 and SR 127 stay merged for eight miles (13 km), where they pass through downtown before leaving Viola and having an intersection with SR 287, to a y-intersection where SR 108 turns north and SR 127 continues northeast. SR 108 then enters McMinnville city and continues north until it intersects SR 55 Bus. It then travels concurrently with SR 55 Bus. and goes northeast through a couple of neighborhoods before crossing the Barren Fork River and enter downtown, where SR 108 meets its northern terminus at SR 56 and SR 380.

## Major intersections

| County | Location | mi | km | Destinations | Notes |
| Marion | Whitwell | 0.0 | 0.0 | SR 28 – Dunlap, Jasper | Southern terminus; begins as a primary highway |
| Grundy | Gruetli-Laager–Palmer town line | | | SR 399 east (Barkertown Road) – Cagle | Western terminus of SR 399; provides access to Savage Gulf State Natural Area (South Cumberland State Park) |
| Grundy | Gruetli-Laager | | | 55th Avenue - Collins West Trailhead (South Cumberland State Park) | |
| Grundy | Coalmont | | | SR 56 – Tracy City, Altamont | |
| Grundy | ​ | | | SR 50 west (Pelham Road) – Pelham | Western end of SR 50 concurrency |
| Grundy | Altamont | | | SR 56 south (Main Street) – Coalmont | Eastern terminus of SR 50; Southern end of SR 56 concurrency; SR 108 turns secondary |
| Grundy | Altamont | | | SR 56 north (Main Street) – Beersheba Springs, McMinnville | Northern end of SR 56 concurrency |
| Warren | Viola | | | SR 127 south (Hillboro-Viola Road) – Hillsboro | Southern end of SR 127 concurrency |
| Warren | ​ | | | SR 287 north – Morrison | Southern terminus of SR 287 |
| Warren | ​ | | | SR 127 north (Shellsford Road) | Northern end of SR 127 concurrency |
| Warren | McMinnville | | | SR 55 Bus. south (South Chancery Street) – Tullahoma | Southern of SR 55 Business concurrency |
| Warren | McMinnville | 61.7 | 99.3 | SR 56 (East Colville Street / South Chancery Street) to SR 380 – Altamont, Smithville | Northern terminus of SR 55 Business and SR 108 |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||