Radika is a river in southern Kosovo and western North Macedonia, a 70 km -long right tributary to the Black Drin river. The Radika proper is 52 km long, but measured from the most distant source in its watershed, that of the Crni Kamen river, it is 70 km long. Overall, the Radika belongs to the Adriatic Sea drainage basin, draining an area of 665 km² itself. It is n…Radika is a river in southern Kosovo and western North Macedonia, a 70 km -long right tributary to the Black Drin river. The Radika proper is 52 km long, but measured from the most distant source in its watershed, that of the Crni Kamen river, it is 70 km long. Overall, the Radika belongs to the Adriatic Sea drainage basin, draining an area of 665 km² itself. It is not navigable. The Radika has huge possibilities for the hydroelectric power production, which is partially used in its upper course. Also, the river valley is the natural route for the major road in Western North Macedonia which connects the regions of Polog and Ohrid.