It connects the community of Potato Valley with the cities of Plainview and Maynardville.

It goes northeast as an unnamed roadway between two ridges before joining Bull Run Road after crossing a ridge.

SR 370 then leaves the community and continues northeast through farmland to come to an end at an intersection with SR 61 just southeast of Maynardville.

The entire route of SR 370 is a rural two-lane highway.

[2][3] The entire route is in Union County.