The Valea Neagră is a left

tributary A tributary, or an ''affluent'', is a stream or river that flows into a larger stream (''main stem'' or ''"parent"''), river, or a lake. A tributary does not flow directly into a sea or ocean. Tributaries, and the main stem river into which they ...

of the Crasna river. It originates in

Romania Romania is a country located at the crossroads of Central Europe, Central, Eastern Europe, Eastern and Southeast Europe. It borders Ukraine to the north and east, Hungary to the west, Serbia to the southwest, Bulgaria to the south, Moldova to ...

near the village of Foieni, crosses into

Hungary Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slovakia to the north, Ukraine to the northeast, Romania to the east and southeast, Serbia to the south, Croatia and ...

north of

Urziceni Urziceni () is a municipiu, city in Ialomița County, Muntenia, Romania, located around north-east of Bucharest. Geography The city is situated at the western edge of the Bărăgan Plain, on the banks of the Ialomița (river), Ialomița River ...

and finally joins the Crasna near

Mérk Mérk is a village in Szabolcs-Szatmár-Bereg county, in the Northern Great Plain region of eastern Hungary Hungary is a landlocked country in Central Europe. Spanning much of the Pannonian Basin, Carpathian Basin, it is bordered by Slov ...

. In Romania, its length is and its basin size is .

References

Rivers of Romania Rivers of Hungary Rivers of Satu Mare County International rivers of Europe {{Hungary-river-stub