High Quality Content by WIKIPEDIA articles! Arkansas Highway 7 is a north–south state highway that runs across the state. The route runs 296.01 miles (476.38 km) from the Louisiana Highway 558 at the Louisiana state line north to Diamond City near the Missouri state line. With the exception of the segment north of Harrison, Highway 7 has been designated as one of the Arkansas Scenic Byways. The road passes through the heart of both the Ozark Mountains and the Ouachita Mountains, and features scenic views. It`s the route favored by motorcycle riders touring the region.