The boundary between Botswana and South Africa extends for 2,031 kilometers (1,262 miles) from the tripoint with Namibia in the west to the tripoint with Zimbabwe in the east. The frontier mostly follows the courses of various rivers, including the Nossob, Molopo and Limpopo. The straight line sections of the boundary were demarcated during the colonial period, and modern-day Botswana and South Africa do not dispute the location of the boundary.