 It flows westwards, on the northern section of the mountain of Ničipurska planina ("Brodec" peak, still part of the Šar massif) and for several kilometers forms the Kosovo-Macedonian border.After it receives the Crni Kamen from the right and another stream coming from Kosovo, the Kafa Kadis turns south into the Macedonian proper again and from this point it is known as the Radika.Upper Radika is just long and due to the human managing of its course, it belongs to the Aegean Sea drainage basin, unlike the latter course of the Lower Radika which belongs to the Adriatic Sea drainage basin.