SR 73 begins at an intersection with
SR 71 in the community of
Higdon, heading north on a two-lane undivided road. The highway heads through rural areas of farms and woods with some homes, curving to the northwest. The highway heads north again as it crosses under several power lines radiating from the
Widows Creek Power Plant along the
Tennessee River. SR 73 continues northeast past homes and businesses in the
Bryant area on top of
Sand Mountain prior to going north through more forested areas with a few rural homes. The highway travels through a mix of farm and woodland before it turns east into forests. SR 73 makes a sharp curve north again to traverse Sand Mountain as it comes to the
Tennessee state line. At this point, the road continues into Tennessee as
SR 377, which ascends Sand Mountain to end at
SR 156 in
New Hope, TN, a town just east of
South Pittsburg, TN. ==History==