State Highway 58 (abbreviated SH-58) is the name of two state highways in Oklahoma. One of them runs for 72.7 miles (117.0 km) from Medicine Park to the Blaine–Custer County line near Hydro,^[1] and the other connects US-270/281/SH-3/33 to the Kansas state line, a length of 105.9 mi (170.4 km).^[3] The northern section has one lettered spur route, SH-58A.

Quick Facts State Highway 58, Route information ...

State Highway 58
Route information
Maintained by ODOT
Existed	c. 1931–present
Section 1
Length	72.7 mi[1] (117.0 km)
South end	SH-49 in Medicine Park
Major intersections	SH-9 in Carnegie I-40 in Hydro
North end	Blaine–Custer county line
Section 2
Length	105.9 mi[2][3] (170.4 km)
South end	US 270 / US 281 / SH-3 / SH-33 west of Watonga
Major intersections	US 60 / US 412 in Ringwood US 64 from Cherokee to Ingersoll
North end	Kansas state line
Location
Country	United States
State	Oklahoma
Highway system
Oklahoma State Highway System Interstate US State Turnpikes
← SH-56 → US 59

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SH-58 was originally a part of US-164. When US-164 was decommissioned in 1930, a section of the road in Major County that was left without a designation became SH-58. Since then, the highway has grown toward both the north and the south. With the designation and extension of the southern section of the highway, SH-58 is present in five counties in the western part of the state.

SH-58 was first commissioned some time between March 1, 1930 and December 1, 1931. The original extent of the route was much shorter than the present highway. In 1931, SH-58 was a dirt road extending from SH-8 east of Fairview north to Ringwood.^[5] Prior to receiving the SH-58 designation, this section of road was part of US-164 and the first SH-13.^[6] On May 29, 1930, AASHO approved an extension of US-60 that replaced US-164.^[7][8] When US-60 replaced US-164 through the area, it was changed to the more westerly route it takes in the present day. The section of old U.S. highway that no longer had a designation became SH-58.^[5]

Throughout the 1930s, SH-58 was expanded in both directions. The first addition to the highway came during the first half of 1932, when the highway was extended north to Helena. No east–west highway existed at this point yet, leading to a spur end.^[9] The highway was extended to the south, replacing SH-44, to Canton on March 29, 1937.^[10][11] SH-58 was extended north to the Kansas state line sometime between April 1937 and April 1938.^[12] This final extension brought SH-58's northern section to its present-day termini, and no major changes to the northern section have occurred since.

SH-58's southern section was first established on October 16, 1945, when SH-54 was given a new alignment further to the west; its old alignment was redesignated as SH-58.^[13] The original routing of SH-58's southern section began at US-277 in Cyril, continued west through Apache, and turned north at the present-day western intersection with SH-19. SH-58 continued north along its present alignment to Hydro, where it ended at US-66/SH-1.^[14]

In 1955, SH-19 was established through southern Caddo County, taking over the east–west section of SH-58. Thus, SH-58 was truncated to where it intersected with SH-19 (the present day western end of their concurrency).^[15] SH-58 was extended to its present terminus north of Hydro the next year.^[16] The highway was further extended in 1964, bringing the southern terminus to its present location near Medicine Park.^[17] No further routing changes have occurred since then.^[4]

SH-58 has one spur, SH-58A, a 5.33-mile (8.58 km)^[2] route in Blaine County. The route begins at SH-58 near Longdale, and travels to Canton Lake. There, the highway runs across the dam impounding the lake. The highway then turns south and ends at SH-51 west of Canton.^[4]