The Estelnic is a right

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or 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 drain the surrounding drai ...

of the

Râul Negru The Râul Negru ( hu, Feketeügy; literally meaning "Black River") is a left tributary of the river Olt (river), Olt in Romania. It discharges into the Olt in Lunca Câlnicului.Romania Romania ( ; ro, România ) is a country located at the crossroads of Central, Eastern, and Southeastern Europe. It borders Bulgaria to the south, Ukraine to the north, Hungary to the west, Serbia to the southwest, Moldova to the east, and ...

. It flows into the Râul Negru near the village Lunga, east of

Târgu Secuiesc Târgu Secuiesc (; hu, Kézdivásárhely, ; german: Szekler Neumarkt; la, Neoforum Siculorum) is a city in Covasna County, Transylvania, Romania. It administers one village, Lunga (''Nyujtód''). History The town was first mentioned in 1407 a ...

.Estelnic (jud. Covasna)
e-calauza.ro Its length is and its basin size is .

References

Rivers of Romania Rivers of Covasna County {{Covasna-river-stub