North Dakota Highway 8 is a north–south highway in North Dakota. The highway is split into two segments. The northern segment is 78 miles (126 km) long and runs from SK 9 in Northgate to ND-23 near New Town. The southern segment is 133 miles (214 km) long and runs from Lake Sakakawea near Twin Buttes to SD-75 near Hettinger. Together, the segments are 211 miles (340 km) long. The highway was originally continuous but was separated by the creation of Lake Sakakawea in the 1950s.