Rock River (Mississippi River)
| Rock river | ||
 Rock River in Rockford IL |
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| Data | ||
| Water code | US : 416824 | |
| location | Wisconsin , Illinois (USA) | |
| River system | Mississippi River | |
| Drain over | Mississippi River → Gulf of Mexico | |
| Confluence of |
East Branch Rock River and West Branch Rock River in Horicon Marsh , Dodge County 43 ° 28 ′ 26 ″ N , 88 ° 38 ′ 41 ″ W. |
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| muzzle | at Rock Island (Illinois) in the Mississippi River Coordinates: 41 ° 28 ′ 57 " N , 90 ° 36 ′ 58" W 41 ° 28 ′ 57 " N , 90 ° 36 ′ 58" W |
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| Mouth height |
168 m
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| length | 459 km | |
| Catchment area | 9,193.79 km² | |
| Left tributaries | Bark River , Green River , Kishwaukee River | |
| Right tributaries | Yahara River , Pecatonica River | |
| Flowing lakes | Lake Koshkonong | |
| Big cities | Rockford | |
| Medium-sized cities | Janesville , Beloit | |
| Small towns | Fort Atkinson | |
 Rock River catchment area |
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 Flooding of the Rock River below Fort Atkinson in June 2004 |
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The Rock River is a 459 km long tributary of the Mississippi River in the US -amerikanischen states Wisconsin and Illinois . Of this, 262.3 kilometers flow through Illinois.
It rises in southeastern Wisconsin, in the southwestern part of Fond du Lac County , about 16 km south of Ripon and 40 km southwest of Lake Winnebago . It flows south through the Horicon Marsh and then meanders through the area between the Wisconsin River and Lake Michigan . He passes Watertown , Jefferson . The Bark River flows into Fort Atkinson , and in northern Rock County the Yahara River flows into the Rock River. The river then flows south via Janesville and Beloit in northern Illinois, where the Pecatonica River joins 8 km south of the state line.
The Rock River continues south through Rockford and continues southwest past Oregon , Dixon, and Rock Falls , from where the river is navigable. The confluence with the Mississippi River is at Rock Island .
