The southern terminus of the highway is at an intersection with SR 9 in the eastern part of the county.

The northern terminus is at an intersection with U.S. Route 280 (US 280) northwest of Alexander City in Kellyton.

SR 115 is routed along a two-lane roadway in southeastern Coosa County.

It travels to the northeast from an intersection with SR 9 towards its northern terminus at US 280.

The entire route is in Coosa County.