SH-164 begins on the southern fringes of Covington at a junction with SH-74. The highway heads east-southeast from this point, paralleling a rail line. About away from the terminus, the highway breaks away from the railroad, heading on a more easterly course, bypassing
Hayward to the north. The highway then crosses from
Garfield County into
Noble County. Just after entering Noble County, it runs along the north outskirts of
Lucien. The road then continues on a due east course before ending at US-77 west of Perry. ==History==