{{Short description|Highway in Oklahoma}} {{Use American English|date=April 2025}} {{Use mdy dates|date=January 2025}} {{Infobox road |state=OK |type=SH |route=20 |maint=ODOT |map=Ok-20 path.png |length_mi=142.7 |length_round=1 |length_ref=<ref name="ggm"/> |direction_a=West |direction_b=East |terminus_a={{jct|state=OK|SH|18}} near Ralston |junction={{plainlist| *{{Jct|state=OK|SH|99}} in Hominy *{{Jct|state=OK|US|75}} in Collinsville *{{Jct|state=OK|I|44|Turnpike|Will Rogers}} in Claremore *{{Jct|state=OK|US|69}} in Pryor *{{Jct|state=OK|US|59|SH|10}} in Jay *{{Jct|state=AR|AR|20}} at the Arkansas state line near Maysville, AR }} |terminus_b={{jct|state=MO|AR|43|Route|43}} at the Arkansas–Missouri state tripoint near Southwest City, MO |counties=Osage, Tulsa, Rogers, Mayes, Delaware, Benton (AR) |previous_type=SH |previous_route=19 |next_type=SH |next_route=22 }}
'''State Highway 20''' (abbreviated '''SH-20''') is a highway in northeastern Oklahoma. Its eastern terminus is at the Missouri state line; its western terminus is at SH-18 near Ralston. The highway runs a total length of {{convert|142.7|mi|km}}. It has no lettered spur routes.
==Route description== 200 px|thumb|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 {{convert|11|mi|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.
==History== 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.<ref name="odot-sh20-closure">{{cite web|author=Oklahoma Department of Transportation|title= SH-20 closed at Keetonville Hill until further notice|url=http://www.odot.org/newsmedia/sh20-keetonville/index.php|access-date=2008-04-29}}</ref> A {{convert|500|ft|m|adj=on}} section of roadbed was washed away, forming a large crack in the pavement and damaging the guardrail.<ref name="odot-sh20-pictures">{{cite web|author=Oklahoma Department of Transportation|url=https://www.odot.org/newsmedia/sh20-keetonville/pics/080416.htm|title=SH-20 Keetonville Pictures|access-date=2008-04-29}}</ref> The highway was re-opened June 5, 2008 after being repaired.
On April 18, 2025, a new section of SH-20 opened, bypassing Claremore to south and connecting to a new interchange at Interstate 44.<ref>{{Cite web |last=read |first=Emory Bryan 1 min |date=2025-04-18 |title=Department of Transportation opens Highway 20 bypass around Claremore |url=https://www.newson6.com/story/6802e22688aa207d17572e8f/department-of-transportation-opens-highway-20-bypass-around-claremore |access-date=2026-05-08 |website=NewsOn6.com |language=en-US}}</ref>
==Major junctions== {{jcttop|hatnote=|unnum=yes|length_ref=<ref name="ggm">{{google maps|url=https://www.google.com/maps/dir/36.507625,-96.719882/36.414416,-96.389669/36.368418,-95.991532/36.365564,-95.920699/36.365556,-95.823037/36.3287655,-95.8213559/36.2784724,-95.6400743/36.3116775,-95.6165646/36.3364658,-95.0684204/36.499443,-94.617684/@36.2691216,-95.615728,59004m/data=!3m1!1e3!4m18!4m17!1m1!4e1!1m1!4e1!1m1!4e1!1m1!4e1!1m1!4e1!1m0!1m0!1m0!1m0!1m1!4e1!3e0!5m1!1e2?hl=en&entry=ttu&g_ep=EgoyMDI2MDUwMi4wIKXMDSoASAFQAw%3D%3D|access-date=May 8, 2026}}</ref>}} {{OKint |county=Osage |cspan=2 |location=none |mile=0.00 |road={{jct|state=OK|SH|18|city1=Ralston|city2=Fairfax}} |notes=Western terminus }} {{OKint |location=Hominy |mile=20.3 |road={{jct|state=OK|SH|99}} }} {{OKint |county=Tulsa |cspan=8 |location=Skiatook |mile=44.2 |road={{jct|state=OK|SH|11}} }} {{OKint |location=Collinsville |lspan=3 |mile=48.2 |road={{jct|state=OK|US|75|city1=Tulsa|city2=Bartlesville}} |notes=Diamond interchange }} {{OKint |mile=53.7 |mspan=2 |place=Western end of freeway section }} {{OKint |mile=none |type=concur |road={{jct|state=OK|US|169|dir1=north|city1=Nowata}} |notes={{ccr-end|West|US-169}} }} {{OKint |location=none |mile=54.9 |road=E. 136th Street N. |notes=Parclo interchange }} {{OKint |location=none |mile=55.7 |road=E. 126th Street N. |notes=Diamond interchange }} {{OKint |location=Owasso |lspan=2 |mile=56.7 |mspan=2 |type=concur |road={{jct|state=OK|US|169|dir1=south}} |notes={{ccr-end|East|US-169}} }} {{OKint |mile=none |place=Eastern end of freeway section }} {{OKint |county=Rogers |cspan=4 |location=Claremore |lspan=4 |type=concur |mile=69.2 |road={{jct|state=OK|SH|66|dir1=west|name1=Lynn Riggs Boulevard}}; former {{jct|state=OK|US|66|dir1=east|noshield=yes}} |notes={{ccr-end|West|SH-66}} }} {{OKint |type=concur |mile=71.8 |road={{jct|state=OK|SH|88|dir1=south|name1=First Street}} |notes={{ccr-end|South|SH-88}} }} {{OKint |type=concur |mile=71.9 |road={{jct|state=OK|SH|66|dir1=east|SH|88|dir2=north|name2=Lynn Riggs Boulevard north}} |notes={{ccr-end|North|SH-66/SH-88}}; former {{jct|state=OK|US|66|dir1=east|noshield=yes}} }} {{OKint |type=toll |mile=73.3 |road={{jct|state=OK|I-Toll|44|Turnpike|Will Rogers|location1=Joplin|city2=Tulsa}} |notes=Exit 255 on I-44 / Turnpike}} {{OKint |county=Mayes |cspan=3 |location=Pryor |mile=88.7 |road={{jct|state=OK|US|69|name1=Mill Street}} }} {{OKint |location=Salina |type=concur |mile=98.4 |road={{jct|state=OK|SH|82|dir1=south}} |notes={{ccr-end|West|SH-82}} }} {{OKint |location=Spavinaw |type=concur |mile=112.9 |road={{jct|state=OK|SH|82|dir1=north}} |notes={{ccr-end|East|SH-82}} }} {{OKint |county=Delaware |cspan=4 |location=none |mile=121.9 |road={{jct|state=OK|SH|28}} |notes=Eastern terminus of SH-28 }} {{OKint |location=Jay |lspan=3 |type=concur |mile=126.4 |road={{jct|state=OK|US|59|SH|10|dir1=south|dir2=south|location1=Upper Spavinaw Recreation Area|city2=Kansas}} |notes={{ccr-end|West|US-59/SH-10}} }} {{OKint |mile=128.1 |road={{jct|state=OK|SH|127}} |notes=Southern terminus of SH-127 }} {{OKint |mile=128.6 |type=concur |road={{jct|state=OK|US|59|SH|10|dir1=north|dir2=north|city1=Grove}} |notes={{ccr-end|East|US-59/SH-10}} }} {{jctint |county_special=Delaware–Benton county line |location=none |type=concur |mile=139.6 |road={{jct|state=AR|AR|43|dir1=south|location1=Maysville Ark.}} |notes={{ccr-end|West|AR 43}} }} {{Jctint |county_special=Delaware–McDonald–<br>Benton county tripoint |location_special=OKARMO Corner |type=concur |mile=145.1 |road={{Jct|state=MO|MO|43|dir1=north|city1=Southwest City}} |notes=Continuation into Missouri; eastern terminus of SH-20 and AR 43 }} {{jctbtm|keys=toll,concur|col=7}}
==References== <references/>
==External links== * [http://www.okhighways.com/ok20.html SH-20 at OKHighways.com] * [https://web.archive.org/web/20101006042937/http://www.twowheelok.com/TV/watch.asp?show=episode2 OK-20 on Two Wheel Oklahoma]
020 Category:Transportation in Osage County, Oklahoma Category:Transportation in Tulsa County, Oklahoma Category:Transportation in Rogers County, Oklahoma Category:Transportation in Mayes County, Oklahoma Category:Transportation in Delaware County, Oklahoma