The Pustnic is a left

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 drainag ...

of the river Olt in

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, a ...

. It flows into the Olt near

Miercurea Ciuc Miercurea Ciuc (; hu, Csíkszereda, ; german: Szeklerburg) is the county seat of Harghita County, Romania. It lies in the Székely Land, a mainly Hungarian-speaking ethno-cultural region in eastern Transylvania, and is situated in the Olt ...

.Pustnic (jud. Harghita)
e-calauza.ro Its length is and its basin size is .

References

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