South Dakota Highway 37

South Dakota Highway 37 (SD 37) is a state route that runs across eastern South Dakota. It begins at the Nebraska border northeast of Niobrara, Nebraska, as a continuation of Nebraska Highway 14. It runs to the North Dakota border north of Hecla, where it continues as North Dakota Highway 1. It is 242 miles (389 km) in length.

Highway 37 marker

Highway 37
Route of SD 37 (in red)
Route information
Defined by SDCL §31-4-158
Maintained by SDDOT
Length242 mi (389 km)
Major junctions
South end N-14 at the Nebraska border
North end ND 1 at the North Dakota border
Highway system
  • South Dakota Highways
SD 36SD 37A.svgSD 38

Route descriptionEdit


South Dakota 37 was in place by 1926, and largely has used the same alignment since. The only significant exception was in northeast South Dakota, where SD 37 originally went westward from Groton to Bath, then north via Columbia to Houghton, where it continued to Hecla. This segment was rerouted to the current alignment by 1929.

On the south end, the road ended at the Missouri River at Running Water. A seasonal ferry was in place to carry traffic across the river. A direct connection via bridge did not open until 1998 when the Chief Standing Bear Memorial Bridge was completed.

In the early and mid-1930s, the segment between Huron and Tripp was co-numbered as U.S. Route 281. This concurrency was dropped by 1936, when US 281 was realigned further west.

The segment between Huron and Mitchell was upgraded to a 4-lane expressway, and was largely completed by 2004. A minor rerouting around the west end of Mitchell occurred, resulting in a 2-mile (3.2 km) concurrency with Interstate 90.

Legal definitionEdit

The route of SD 37 is defined in South Dakota Codified Laws § 31-4-158.[1]

Major intersectionsEdit

Bon Homme  SD 52 east – YanktonWestern terminus of SD 52
  SD 50 east – TyndallEastern end of SD 50 concurrency
  SD 50 west – AvonWestern end of SD 50 concurrency
  SD 46 – Wagner
Hutchinson  SD 37A – Tripp
  US 18 – Canton
Parkston  SD 44 – Platte
Davison  SD 42 – Ethan
Mitchell   I-90 east / I-90 Bus. – Sioux FallsEastern end of I‑90 concurrency, Exit 332; I‑90 Bus. is a continuation north of the I‑90 interchange
   I-90 west / I-90 Bus. – Rapid CityWestern end of I‑90 concurrency, Exit 330; southern end of I‑90 Bus. concurrency
  I-90 Bus.Northern end of I‑90 Bus. concurrency
Sanborn  SD 34 east – ArtesianEastern end of SD 34 concurrency
  SD 34 west – WoonsocketWestern end of SD 34 concurrency
  SD 224 west – AlpenaWestern terminus of SD 224
BeadleHuron  US 14 – Pierre, DeSmet
county line
  SD 28 – Hitchcock
Spink  US 212 west – RedfieldWestern end of US 212 concurrency
Doland  US 212 east – ClarkEastern end of US 212 concurrency
  SD 20 east – WatertownSouthern end of SD 20 concurrency
Conde  SD 20 west – BrentfordNorthern end of SD 20 concurrency
BrownGroton  US 12 – Aberdeen, Webster
  SD 10 east – BrittonEastern end of SD 10 concurrency
  SD 10 west – LeolaWestern end of SD 10 concurrency
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

Related routeEdit


Highway 37A

South Dakota Highway 37A (SD 37A) is a north–south state highway in the U.S. state of South Dakota. SD 37A's southern terminus is at SD 37 in Tripp, and the northern terminus is at US 18 north of Tripp.

The entire route is in Hutchinson County.

Tripp0.0000.000  SD 37Southern terminus
  US 18Northern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See alsoEdit


  1. ^ "South Dakota Codified Law". Retrieved November 3, 2012.

External linksEdit

Route map:

KML is from Wikidata