Râul Negru

The Râul Negru (Feketeügy; literally meaning "Black River") is a left tributary of the river Olt in Romania. It joins the Olt in Lunca Câlnicului. The Râul Negru flows through the villages Lemnia, Lunga, Catalina, Hătuica, Surcea, Telechia, Bita, Reci, Sântionlunca, Ozun, Băcel, Chichiș and Lunca Câlnicului. Its length is 88 km and its basin size is 2349 km2.

Tributaries
The following rivers are tributaries to the Râul Negru (from source to mouth):


 * Left: Pârâul Mare, Brețcu, Stânca Uriașului, Capolna, Ojdula, Pârâul Racilor, Ghelința, Borviz, Zăbala, Fundul Pârâului, Covasna, Pârâul Beldii, Lisnău, Pârâul Satului, Tărlung
 * Right: Lemnia, Estelnic, Cașin, Mărtineni, Mărcușa, Dalnic, Pădureni, Reci, Angheluș