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.
Route description
Texas to I-35
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 turningnortheast 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.
I-35 to Tulsa
After crossing I-35, SH-51 becomes a multilane highway and a major corridor linking I-35 to Stillwater, the home of
Oklahoma State University. Along this stretch is an intersection with
State Highway 86. When Highway 51...
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