High Quality Content by WIKIPEDIA articles! State Highway 37 (SH-37 or OK-37) is a designation for two separate highways in the state of Oklahoma. The northern section runs between Hinton and Moore in central Oklahoma, while the southern section runs from the Texas state line at the Red River to Idabel, in southeastern Oklahoma. The northern section of SH-37 runs 67.1 miles from US-281 in Hinton to Sunnylane Road (former SH-77H) in Moore. The southern section of SH-37 is 12.6 miles (20.3 km) long.