Plesná (river)
The Plesná is a river in the Czech Republic and Germany. It flows through Saxony in Germany and through the Karlovy Vary Region. It is a left tributary of the Ohře River. It is long.
Etymology
The name Plesná is probably derived from the Old Czech adjective blizní and refers to the confluence with the Ohře, which is very close to the confluence of the Ohře with the Sázek Stream.Characteristic
The Plesná originates in the territory of Bad Brambach in the Fichtel Mountains at an elevation of and flows to Nebanice, where it enters the Ohře River at an elevation of. It is long, of which is in the Czech Republic. Its drainage basin has an area of.The longest tributaries of the Plesná are:
| Tributary | Length | Side |
| Lubinka | 12.2 | left |
| Pstruhový potok | 9.2 | left |