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 in length.

Route description

History 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 concurrency with Interstate 90.

Legal definition The route of SD 37 is defined in South Dakota Codified Laws § 31-4-158.

Major intersections

Related routes 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.

Highway 37P

South Dakota Highway 37P (SD 37P) consists of two spur routes off the SD 37 mainline. The southern spur occurs just north of the Nebraska state border, branching from SD 37 in Running Water and extending to CR 22 (Main St/The Bottom Rd). The northern spur occurs at the northern edge of Springfield, running through the city for before terminating at the intersection of CR 314 (8th St) and CR 414 (Wood St).

South Dakota Highway 37

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