Tennessee State Route 309

State Route 309 (SR 309), also known as Union Grove Road, is a 2.6-mile-long (4.2 km) east–west state highway in McMinn County, Tennessee. It serves as the primary access road from Interstate 75 (I-75, Exit 56) to the town of Niota.

State Route 309
Union Grove Road
SR 309 highlighted in red
Route information
Maintained by TDOT
Length	2.6 mi (4.2 km)
Existed	July 1, 1983[1]–present
Major junctions
West end	I-75 near Niota
East end	US 11 in Niota
Location
Country	United States
State	Tennessee
Counties	McMinn
Highway system
Tennessee State Routes Interstate US State
← SR 308 → SR 310

Route description

SR 309 begins at an interchange with I-75 (Exit 56). It heads east past a few roadside businesses before passing through farmland as a two-lane highway. It then enters Niota and comes to an end at an intersection with U.S. Route 11 (US 11, Willson Street/SR 2) on the north side of town.^[2]

Major intersections

The entire route is in McMinn County.

Location	mi	km	Destinations	Notes
​	0.0	0.0	I-75 – Chattanooga, Knoxville	I-75 exit 56; western terminus
Niota	2.6	4.2	US 11 (Willson Street/SR 2) – Athens, Sweetwater	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi