The border consists of two straight line segments.[2] The first is a continuation of the Libya–Niger border; this section continues from the tripoint in a straight line for about 113 km (70 mi) up to the Tropic of Cancer. The border then turns to the southeast, running for 942 km (586 mi) to the tripoint with Sudan. The border lies wholly within the Sahara Desert, cutting through parts of the Tibesti Mountains in the far west.