South Dakota Highway 73
Route of SD 73 (in red) | ||||
| Route information | ||||
| Maintained by SDDOT | ||||
| Length | 255.291 mi (410.851 km) | |||
| Existed | 1926–present | |||
| Major junctions | ||||
| South end | N-61 at the Nebraska border | |||
| North end | ND 49 at Thunder Hawk | |||
| Location | ||||
| Country | United States | |||
| State | South Dakota | |||
| Counties | Bennett, Jackson, Haakon, Ziebach, Meade, Perkins, Corson | |||
| Highway system | ||||
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South Dakota Highway 73 (SD 73) is a state route that runs across western South Dakota. It begins at the Nebraska border, north of Merriman, Nebraska, as a continuation of Nebraska Highway 61. It runs to the North Dakota border, where it continues as North Dakota Highway 49. It is just more than 255 miles (410 km) in length.