Oklahoma State Highway 20

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State Highway 20

Route information
Maintained by ODOT
Length142.7 mi[1] (229.7 km)
Major junctions
West end SH-18 near Ralston
Major intersections
East end Route 43 at the Missouri state line (concurrent with AR 43)
CountryUnited States
Highway system
  • Oklahoma State Highway System
SH-19 SH-22

State Highway 20 (abbreviated SH-20) is a highway in northeastern Oklahoma. Its eastern terminus is at the corner of Oklahoma, Arkansas, and Missouri near Southwest City, Missouri; its western terminus is at State Highway 18 near Ralston. The highway runs a total length of 142.7 miles (229.7 km). It has no lettered spur routes.

Route description

Eastern terminus of State Highway 20 at Missouri Route 43

SH-20 begins just north of the Arkansas River at SH-18 near Ralston. From there, it heads east through Osage County for 20 miles (32 km) without crossing any other highway. At mile 20.4, it meets State Highway 99 in Hominy. East of Hominy, SH-20 crosses Lake Skiatook before passing through Skiatook and entering Tulsa County. Shortly after entering Tulsa County, SH-20 has a junction with SH-11. Four miles later, it has an interchange with US-75. After running through Collinsville, it turns southward onto the US-169 freeway.

SH-20 splits from US-169 north of Owasso. It then enters Claremore, where it meets SH-88 and SH-66 (old Route 66). It connects to the Claremore toll plaza on I-44/Will Rogers Turnpike. East of Claremore, SH-20 becomes a divided expressway before intersecting US-69 in Pryor. West of Salina, the highway bridges Lake Hudson. In Salina, SH-20 meets SH-82, with which it begins a concurrency.

Headed north from Salina, the two highways begin to cross some mountainous terrain. The highways provide access to Spavinaw State Park, before running through the town of Spavinaw, Oklahoma. North of Spavinaw, SH-20 splits off to the east, running through unincorporated Chloeta and serving as the eastern terminus of SH-28. SH-20 overlaps US-59/State Highway 10 through Jay. SH-20 then splits off to the east, running 11 miles (18 km) to the Arkansas line.

The easternmost miles run north/south along the Oklahoma–Arkansas state line, and along this stretch the highway overlaps Arkansas's Highway 43. The highway continues northward into Missouri at the point where the Oklahoma, Arkansas and Missouri borders meet, and thereafter becomes Missouri Route 43.


On April 10, 2008, a section of SH-20 in Rogers County near Keetonville, west of Claremore, was closed due to a landside caused by heavy rains.[2] A 500-foot (150 m) section of roadbed was washed away, forming a large crack in the pavement and damaging the guardrail.[3] The highway was re-opened June 5, 2008 after being repaired.

Major junctions

OklahomaOsage0.000.00 SH-18Western terminus
Hominy20.332.7 SH-99
TulsaSkiatook44.271.1 SH-11
Collinsville48.277.6 US 75Diamond interchange
US 169 north
West end of freeway section; western end of US-169 concurrency
54.988.4E. 136th Street N.Parclo interchange
55.789.6E. 126th Street N.Diamond interchange
US 169 south
East end of freeway section; eastern end of US-169 concurrency
SH-88 north (Will Rogers Boulevard west) / Moore Avenue
Western end of SH-88 concurrency
SH-66 east (Lynn Riggs Boulevard north)
Northern end of SH-66 concurrency; former US 66 east

SH-66 west / SH-88 south (Lynn Riggs Boulevard south)
Southern end of SH-66/SH-88 concurrency; former US 66 west
70.9114.1 I-44 / Will Rogers Turnpike – Joplin, TulsaI-44 exit 255
MayesPryor86.3138.9 US 69 (Mill Street)
SH-82 south
Western end of SH-82 concurrency
SH-82 north
Eastern end of SH-82 concurrency
Delaware119.5192.3 SH-28Eastern terminus of SH-28
US 59 / SH-10 south
Western end of US-59/SH-10 concurrency
125.7202.3 SH-127Southern terminus of SH-127
US 59 / SH-10 north
Eastern end of US-59/SH-10 concurrency
OklahomaArkansas lineDelawareBenton county line137.2220.8
AR 43 south – Maysville Ark.
Western end of AR 43 concurrency
Arkansas state tripoint
Benton county tripoint

AR 43 ends / Route 43 north – Southwest City
Continuation into Missouri; northern end of AR 43 overlap
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Google (December 22, 2012). "Oklahoma State Highway 20" (Map). Google Maps. Google. Retrieved December 22, 2012.
  2. ^ Oklahoma Department of Transportation. "SH-20 closed at Keetonville Hill until further notice". Retrieved 2008-04-29.
  3. ^ Oklahoma Department of Transportation. "SH-20 Keetonville Pictures". Retrieved 2008-04-29.

External links