South Dakota Highway 45
# South Dakota Highway 45

South Dakota Highway 45 is a state highway that runs north to south across much of central South Dakota, United States. The northern terminus is at the North Dakota border as a continuation of North Dakota Highway 3, and runs south to South Dakota Highway 44 at Platte. It is 198 miles (319 km) in length.

## History

SD 45 was established around 1927. The southern terminus was at the intersection of present-day SD 50 and County Road 49 (CR 49) and the northern terminus was at the intersection of SD 10 in Leola.

By 1932, it was extended south along what was part of SD 47 to Wheeler. By 1936, SD 45 was truncated at Kimball, at US 16, as US 281 supplanted the SD 45 designation to the south. In the early 1950s, when US 281 was relocated several miles to the east, SD 45 was extended back south to SD 50.

Around 1970, SD 50 had been realigned to intersect SD 44 west of Platte, and SD 45 was extended south along the old alignment to Platte, where it remains today.

The north end of the route has remained in its current configuration since 1936.

## Major intersections

| County | Location | Destinations | Notes |
| - | - | - | - |
| Charles Mix | Platte | SD 44 / SD 50 – Winner | Southern terminus |
| Brule | ​ | I-90 east – Mitchell | Eastern end of I-90 concurrency, Exit 289. |
| Brule | Kimball | I-90 west – Rapid City | Western end of I-90 concurrency, Exit 284. |
| Buffalo | ​ | SD 34 – Wessington Springs | |
| Hand | Miller | US 14 east – St. Lawrence | Southern end of US 14 concurrency |
| Hand | Miller | US 14 west – Pierre | Northern end of US 14 concurrency |
| Hand | ​ | SD 26 east | Southern end of SD 26 concurrency |
| Hand | ​ | SD 26 west | Northern end of SD 26 concurrency |
| Hand–Faulk county line | ​ | US 212 east – Redfield | Southern end of US 212 concurrency |
| Faulk | ​ | US 212 west – Faulkton | Northern end of US 212 concurrency |
| Faulk | ​ | SD 20 east – Northville | Southern end of SD 20 concurrency |
| Faulk | ​ | SD 20 west – Onaka | Northern end of SD 20 concurrency |
| Edmunds | Ipswich | US 12 west – Roscoe | Western end of US 12 concurrency |
| Edmunds | ​ | US 12 east – Aberdeen | Eastern end of US 12 concurrency |
| McPherson | Leola | SD 10 east – Britton | Eastern end of SD 10 concurrency |
| McPherson | ​ | SD 239 north – Long Lake | |
| McPherson | ​ | SD 10 west / SD 247 south | Northern terminus; western end of SD 10 concurrency |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||
