In the U.S. state of West Virginia, Interstate 77 (I-77) is a major north–south Interstate highway. It extends for 187.21 miles (301 km) between Bluefield at the Virginia state line to Williamstown at the Ohio state line. The highway serves Charleston, the capital and largest city in West Virginia; it also serves the large cities of Beckley, Bluefield, and Parkersburg. I-77 uses the entire length of the West Virginia Turnpike between Princeton and Charleston, and it is concurrent with Interstate 64 between Beckley and Charleston.