High Quality Content by WIKIPEDIA articles! State Highway 76, also referred to as SH-76 or OK-76, is a highway maintained by the U.S. state of Oklahoma. It is 110.7 miles (178.6 km) long. It runs north–south through central Oklahoma, beginning at Jimtown Road just north of the Red River and ending north of Newcastle at SH-37. It has no lettered spur routes.