The western terminus of the highway is at an intersection with U.S. Route 43 (US 43) approximately six miles (9.7 km) north of Fayette.

The eastern terminus of the highway is at an intersection with SR 124 in Townley in western Walker County.

SR 102 serves as a connecting route between Fayette and Jasper.

From its western terminus, the highway travels across Fayette and Walker counties.

The route reaches its eastern terminus in the unincorporated town of Townley, where it intersects SR 124, which heads to Jasper.