Arkansas Highway 7 (AR 7) is a north–south state highway in Arkansas, United States. As Arkansas's longest state highway, the route runs 297.27 miles (478.41 km) from the Louisiana state line north to Diamond City. With the exception of the segment north of Harrison, Highway 7 has been designated as an Arkansas Scenic Byway and a National Forest Scenic Byway. 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.