Tennessee State Route 399

State Route 399 (SR 399) is 10.6-mile-long (17.1 km) east–west state highway in the Cumberland Plateau region of Tennessee. It serves to connect the towns of Gruetli-Laager and Palmer to Cagle and the Savage Gulf State Natural Area portion of South Cumberland State Park.

State Route 399
Barkertown Road Rifle Range Road
TN 399 highlighted in red
Route information
Maintained by TDOT
Length	10.6 mi (17.1 km)
Major junctions
West end	SR 108 on the Gruetli-Laager–Palmer city line
East end	SR 8 / SR 111 in Cagle
Location
Country	United States
State	Tennessee
Counties	Grundy, Sequatchie
Highway system
Tennessee State Routes Interstate US State
← SR 397 → SR 400

SR 399 is known as Barkertown Road in Grundy County and Rifle Range Road in Sequatchie County.

Route description

SR 399 begins in Grundy County on the Gruetli-Laager–Palmer city line at an intersection with SR 108. It heads northeasterly through farmland and rural areas to cross a bridge over the Collins River before passing by the Savage Gulf State Natural Area portion of South Cumberland State Park. The highway then curves to the east and crosses into Sequatchie County. SR 399 then goes through remote wooded areas for the next several miles before entering farmland and the community of Cagle to come to an end at an intersection with SR 8/SR 111. The entire route of SR 399 is a two-lane rural highway and lies entirely atop the Cumberland Plateau.^[1][2][3]

Major intersections

County	Location	mi	km	Destinations	Notes
Grundy	Gruetli-Laager–Palmer line	0.0	0.0	SR 108 – Gruetli-Laager, Palmer	Western terminus
	​	1.5	2.4	Bridge over the Collins River
	South Cumberland State Park	5.1	8.2	Savage Gulf State Natural Area (South Cumberland State Park) main entrance	Access road into park
Sequatchie	Cagle	10.6	17.1	SR 8 / SR 111 – Spencer, McMinnville, Dunlap	Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi