State Highway 51 | ||||
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Route information | ||||
Maintained by ODOT | ||||
Length: | 332.8 mi (535.6 km) | |||
Existed: | 1 June 1927 – present | |||
Major junctions | ||||
West end: | US-60 at Texas state line | |||
I-35 I-244 in Tulsa I-444 in Tulsa I-44 in Tulsa Muskogee Turnpike in Broken Arrow |
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East end: | AR 244 at the Arkansas state line | |||
Highway system | ||||
Oklahoma State Highway System
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State Highway 51, abbreviated to SH-51 or OK-51, is a major state highway in Oklahoma. It runs for 333 miles (535½ km) east–west across the state, running from the Texas state line to Arkansas. It is the third-longest state highway in the system.
SH-51 begins at the Texas line concurrent with US-60 just east of Higgins, Texas. It remains concurrent for 61 miles (98 km) until it reaches US-270/US-281/SH-3 at Seiling, Oklahoma. At Seiling, SH-51 joins with those three highways for nine miles (14 km) before splitting off on its own.
11 miles (18 km) after splitting off, Highway 51 meets SH-58 in Canton. It then continues east, crossing the North Canadian River and meeting SH-51A before turning northeast toward Okeene, where it intersects SH-8. SH-51 will go for 24 miles (39 km) before intersecting another highway.
In Hennessey SH-51 meets U.S. Highway 81 before continuing eastward. 17 miles (27 km) later, it meets SH-74 north of Crescent. 11 miles (17 km) to the east, it shares a brief concurrency with US-77; two miles (3 km) later it has an interchange at Interstate 35, milemarker 174.