It does not connect to its implied parent, State Highway 17.

SH-17A begins at I-35 exit 64, a diamond interchange, in unincorporated Garvin County west-southwest of Wynnewood.

The highway continues due east from this interchange.

SH-17A crosses the Washita River midway through its route.

The route ends at an intersection with US-77 south of Wynnewood.