Zadrna

Coordinates: 50°47′12″N 16°2′21″E / 50.78667°N 16.03917°E / 50.78667; 16.03917
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Zadrna
Zadrna River in Kamienna Góra
Location
CountryPoland
Physical characteristics
Source 
 • locationGóry Krucze near Błażejów
 • coordinates50°39′40.5″N 16°1′44.1″E / 50.661250°N 16.028917°E / 50.661250; 16.028917
 • elevation600 m (2,000 ft)
Mouth 
 • location
Bóbr in Kamienna Góra
 • coordinates
50°47′12″N 16°2′21″E / 50.78667°N 16.03917°E / 50.78667; 16.03917
 • elevation
440 m (1,440 ft)
Length16 km (9.9 mi)
Basin size112 km2 (43 sq mi)
Basin features
ProgressionBóbrOderBaltic Sea

Zadrna (German: Zieder) is a river in Lower Silesian Voivodeship in southwestern Poland, a right tributary of the Bóbr. It rises in the Góry Krucze range of the Central Sudetes near the village of Błażejów, close to the border with the Czech Republic.