The Rock River is a tributary of the

Mississippi River The Mississippi River is the second-longest river and chief river of the second-largest drainage system in North America, second only to the Hudson Bay drainage system. From its traditional source of Lake Itasca in northern Minnesota, it fl ...

, approximately long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline data
The National Map
accessed May 13, 2011 in the

U.S. state In the United States, a state is a constituent political entity, of which there are 50. Bound together in a political union, each state holds governmental jurisdiction over a separate and defined geographic territory where it shares its sov ...

s of

Wisconsin Wisconsin () is a state in the upper Midwestern United States. Wisconsin is the 25th-largest state by total area and the 20th-most populous. It is bordered by Minnesota to the west, Iowa to the southwest, Illinois to the south, Lake Michi ...

and

Illinois Illinois ( ) is a state in the Midwestern United States. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other smaller metropolitan areas include, Peoria and Rockfo ...

. The river was known as the Sinnissippi to Sauk and

Fox Foxes are small to medium-sized, omnivorous mammals belonging to several genera of the family Canidae. They have a flattened skull, upright, triangular ears, a pointed, slightly upturned snout, and a long bushy tail (or ''brush''). Twelve s ...

Indians; the name means "rocky waters". The river, which has a notable higher western bank, begins with three separate branches which flow into the

Horicon Marsh Horicon Marsh is a marsh located in northern Dodge and southern Fond du Lac counties of Wisconsin. It is the site of both a national and a state wildlife refuge. The silted-up glacial lake is the largest freshwater cattail marsh in the United Sta ...

. The northernmost branch, the West Branch, begins just to the west of the village of

Brandon Brandon may refer to: Names and people *Brandon (given name), a male given name * Brandon (surname), a surname with several different origins Places Australia *Brandon, a farm and 19th century homestead in Seaham, New South Wales * Brandon, ...

Fond du Lac County, Wisconsin Fond du Lac County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 104,154. Its county seat is Fond du Lac. The county was created in the Wisconsin Territory in 1836 and later organized in 1844. Fond du La ...

and flows east and then south to Horicon Marsh. The South Branch rises north of Fox Lake in Dodge County and flows east through

Waupun Waupun is a city in Dodge and Fond du Lac counties in the U.S. state of Wisconsin. The population was 11,344 at the 2020 census. Of this, 7,795 were in Dodge County, and 3,549 were in Fond du Lac County. In Fond du Lac County, the Town of Waupun ...

to the marsh. The East Branch rises southeast of Allenton in Washington County just west of the

Niagara Escarpment The Niagara Escarpment is a long escarpment, or cuesta, in Canada and the United States that runs predominantly east–west from New York through Ontario, Michigan, Wisconsin, and into Illinois. The escarpment is most famous as the cliff ove ...

, and flows north and west through Theresa to the marsh. Leaving the marsh, it meanders southward to the Illinois border, ending about 300 miles later at the Mississippi River at the

Quad Cities The Quad Cities is a region of cities (originally four, see #History, History) in the U.S. states of Iowa and Illinois: Davenport, Iowa, Davenport and Bettendorf, Iowa, Bettendorf in southeastern Iowa, and Rock Island, Illinois, Rock Island, Moli ...

in Illinois and Iowa. During its course it passes through Watertown, collects the

Crawfish River The Crawfish River is a tributary of the Rock River, long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed May 13, 2011 in south-central Wisconsin in the United States. Via the Rock Riv ...

in Jefferson, and receives the Bark River at Fort Atkinson. Shortly before merging, the Rock and Crawfish rivers cross

Interstate 94 Interstate 94 (I-94) is an east–west Interstate Highway connecting the Great Lakes and northern Great Plains regions of the United States. Its western terminus is just east of Billings, Montana, at a junction with I-90; its eastern term ...

. Both rivers flood the nearby land regularly, and lanes on I-94 were temporarily closed in 2008 because of this flooding. In northern

Rock County, Wisconsin Rock County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 163,687. Its county seat is Janesville. Rock County comprises the Janesville- Beloit, WI Metropolitan Statistical Area and is included in the ...

, it receives the

Yahara River The Yahara River is a tributary of the Rock River in southern Wisconsin. It is about longU.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed May 13, 2011 (including the distance across inte ...

, and flows southward through tiny Fulton, Janesville and Beloit into northern Illinois, where it receives the

Pecatonica River The Pecatonica River is a tributary of the Rock River, long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed May 13, 2011 in southern Wisconsin and northern Illinois in the United States ...

5 miles (8 km) south of the state line. It flows south through Rockford, then southwest across northwestern Illinois, picking up the

Kishwaukee River The Kishwaukee River, locally known as simply The Kish, is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map, accessed May 13, 2011 river in the U.S. state of Illinois.. United States Board on ...

, passing

Oregon Oregon () is a state in the Pacific Northwest region of the Western United States. The Columbia River delineates much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idaho. ...

, Dixon, Sterling (which has the Sinnissippi Mounds national historic site and local park) and Rock Falls before joining the

Mississippi Mississippi () is a state in the Southeastern region of the United States, bordered to the north by Tennessee; to the east by Alabama; to the south by the Gulf of Mexico; to the southwest by Louisiana; and to the northwest by Arkansas. Missis ...

at Rock Island. It was on the Rock River in Dixon where Ronald Reagan was a lifeguard. Reagan's favorite fishing spot, now called "Dutch Landing" after Reagan's

nickname A nickname is a substitute for the proper name of a familiar person, place or thing. Commonly used to express affection, a form of endearment, and sometimes amusement, it can also be used to express defamation of character. As a concept, it is ...

, was just southwest of Lowell Park on the Rock River. There are 25 dams on the Rock River. These are in Theresa (WI, 3 dams), Waupun (WI), Horicon (WI), Mayville (WI, 2 dams), Kekoskee (WI), Hustisford (WI), Watertown (WI, 2 dams), Jefferson (WI, 4 dams), Indianford (WI), Janesville (WI), Beloit (WI), Rockton (IL), Rockford Fordham (IL), Oregon (IL), Dixon (IL), Sterling / Rock Falls (IL, 2 dams), Milan (IL) and Rock Island (IL). Rock River Trail Scenic and Historic Route Dodge County Wisconsin

Rock River Trail Scenic and Historic Route Dodge County Wisconsin

The river is used for various water and paddling sports. The Rock River Water Trail is on the river from its headwaters above the Horicon National Wildlife Refuge in south central Wisconsin to the confluence with the Mississippi River at the

of Illinois and Iowa 330 miles downriver. It crosses five counties in Wisconsin, six counties in Illinois and runs through 37 municipalities. The slow moving river passes scenic rural landscapes, wilderness areas and urban areas. The first two trailheads are at Waupun County Park in

Waupun, Wisconsin Waupun is a city in Dodge and Fond du Lac counties in the U.S. state of Wisconsin. The population was 11,344 at the 2020 census. Of this, 7,795 were in Dodge County, and 3,549 were in Fond du Lac County. In Fond du Lac County, the Town of Waupun ...

and Rivers Edge Park in Theresa, Wisconsin and there are 32 additional access points in

Dodge County, Wisconsin Dodge County is a county located in the U.S. state of Wisconsin. As of the 2020 census, the population was 89,396. Its county seat is Juneau. The county was created from the Wisconsin Territory in 1836 and organized in 1844. Dodge County compr ...

. The trail is part of the National Water Trails System and the first National Water Trail in Wisconsin and Illinois. Rock River Park is on County Road B about a half mile west of

Johnson Creek, Wisconsin Johnson Creek is a village in Jefferson County, Wisconsin, United States. The population was 3,318 at the 2020 census. The village is approximately halfway between Milwaukee and Madison, at the intersection of Wisconsin Highway 26 and Interstate ...

Jefferson County, Wisconsin Jefferson County is a county in the U.S. state of Wisconsin. As of the 2020 census, the population was 84,900. Its county seat is Jefferson. Jefferson County comprises the Watertown- Fort Atkinson, WI Micropolitan Statistical Area, which is ...

and offers river access and an artesian spring. Watertown River Walk 02

Cities and villages along the river

Communities listed from north to south. * Brandon, Wisconsin (West Branch) *

(South Branch) * Theresa, Wisconsin (East Branch) *

Mayville, Wisconsin Mayville is a city in Dodge County, Wisconsin, United States, located along the Rock River and the Horicon Marsh. The population was 5,154 at the 2010 census. Geography Mayville is located at (43.497044, -88.547871). According to the United ...

(East Branch) * Kekoskee, Wisconsin (East Branch) *

Horicon, Wisconsin Horicon is a city in Dodge County, Wisconsin, United States. The population was 3,655 at the 2010 census. Geography Horicon is located at (43.4482, -88.6329). According to the United States Census Bureau, the city has a total area of , of which ...

Hustisford, Wisconsin Hustisford is a village in Dodge County, Wisconsin, United States. The population was 1,123 at the 2010 census. The village is located within the town of Hustisford. History The village was named for John Hustis, a pioneer settler. Geography ...

* Ixonia, Wisconsin *

Watertown, Wisconsin Watertown is a city in Dodge and Jefferson counties in the U.S. state of Wisconsin. Most of the city's population is in Jefferson County. Division Street, several blocks north of downtown, marks the county line. The population of Watertown was 22 ...

Jefferson, Wisconsin Jefferson is a city in Jefferson County, Wisconsin, United States, and is its county seat. It is at the confluence of the Rock and Crawfish rivers. The population was 7,973 at the 2010 census. The city is partially bordered by the Town of Jeff ...

Fort Atkinson, Wisconsin Fort Atkinson is a city in Jefferson County, Wisconsin, United States. It is on the Rock River, a few miles upstream from Lake Koshkonong. The population was 12,579 at the 2020 census. Fort Atkinson is the largest city located entirely in Jeffe ...

* Indianford, Wisconsin *

Fulton, Wisconsin Fulton is a town in Rock County, Wisconsin, in the United States. As of the 2000 census, the town population was 3,158. The unincorporated communities of Fulton and Indianford are located in the town. The unincorporated community of Newville ...

Janesville, Wisconsin Janesville is a city in Rock County, Wisconsin, United States. It is the county seat and largest city in the county. It is a principal municipality of the Janesville, Wisconsin, Metropolitan Statistical Area and is included in the Madison–Ja ...

* Afton, Wisconsin *

Beloit, Wisconsin Beloit is a city in Rock County, Wisconsin, United States. As of the 2020 census, the city had a population of 36,657 people. History Twelve men in Colebrook, New Hampshire, created the "New England Emigrating Company" in October 1836 and sent ...

South Beloit, Illinois South Beloit, is a city located in Winnebago County, Illinois, USA. It is part of the Rockford Metropolitan Area, but it is also a suburban extension of Beloit, Wisconsin. South Beloit,is directly along the border of smaller cities and towns nort ...

Rockton, Illinois Rockton is a village in Winnebago County, Illinois. It is located in the Rock River Valley and is part of the Rockford metropolitan area. The population was 7,685 at the time of the 2010 census, up from 5,296 at the time of the 2000 census. Geog ...

Roscoe, Illinois Roscoe is a village in Winnebago County, Illinois, along the Rock River. It is in a suburban area of the Rockford, Illinois Metropolitan Statistical Area. As of the 2010 census, the village population was 10,785, up from 6,244 at the 2000 censu ...

Machesney Park, Illinois Machesney Park is a village located in Winnebago County, Illinois, United States. The population was 23,499 at the 2010 census, up from 20,759 in 2000. Machesney Park is a suburb of Rockford, Il and is part of the Rockford, Illinois Metropolitan ...

Loves Park, Illinois Loves Park is a city in Boone and Winnebago counties in the U.S. state of Illinois. Most of the city is in Winnebago County, with a tiny sliver in the east located in Boone County. The population was 23,996 at the 2010 census, up from 20,044 in ...

Rockford, Illinois Rockford is a city in Winnebago County, Illinois, located in the far northern part of the state. Situated on the banks of the Rock River, Rockford is the county seat of Winnebago County (a small portion of the city is located in Ogle County). ...

* Byron, Illinois *

Oregon, Illinois Oregon ( ) is a city in and the county seat of Ogle County, Illinois, United States. The population was 3,721 in 2010.U.S. Census BureaPopulation, Age, Sex, Race, Households/ref> History The land Oregon, Illinois was founded on was previously hel ...

* Grand Detour, Illinois *

Dixon, Illinois Dixon is a city and the county seat of Lee County, Illinois, United States. The population was 15,733 as of the 2010 census, down from 15,941 in 2000. The city is named after founder John Dixon, who operated a rope ferry service across the R ...

Sterling, Illinois Sterling is a city in Whiteside County, Illinois, United States. The population was 14,782 at the 2020 census, down from 15,370 in 2010. Formerly nicknamed "Hardware Capital of the World", the city has long been associated with manufacturing an ...

Rock Falls, Illinois Rock Falls is a city in Whiteside County, Illinois, United States. The recorded population was 8,606 at the 2020 census, down 7.12% from 9,266 in 2010. The city is located on the Rock River, directly opposite its twin city of Sterling. Geog ...

* Lyndon, Illinois *

Prophetstown, Illinois Prophetstown is a city in Whiteside County, Illinois, United States. The population was 2,080 at the 2010 census, up from 2,023 in 2000. Geography Prophetstown is located at (41.670504, -89.935869). According to the 2010 census, Prophetstown h ...

Erie, Illinois Erie is a village in Whiteside County, Illinois, United States. The population was 1,602 at the 2010 census, up from 1,589 in 2000. It is known for its unusual layout, specifically its "town triangle". History Erie is named after Erie County, ...

* Hillsdale, Illinois * Cleveland, Illinois * Colona, Illinois *

Moline, Illinois Moline ( ) is a city located in Rock Island County, Illinois, United States. With a population of 42,985 in 2020, it is the largest city in Rock Island County. Moline is one of the Quad Cities, along with neighboring East Moline and Rock Islan ...

Coal Valley, Illinois The village of Coal Valley is located in both Rock Island County and Henry County in the U.S. state of Illinois. The population was 3,743 at the 2010 census, up from 3,606 in 2000. It is mostly residential, housing families who work in or out of ...

* Milan, Illinois *

Rock Island, Illinois Rock Island is a city in and the county seat of Rock Island County, Illinois, United States. The original Rock Island, from which the city name is derived, is now called Arsenal Island. The population was 37,108 at the 2020 census. Located on ...

References

External links

Rock River Trail
{{authority control Rivers of Illinois Rivers of Wisconsin Tributaries of the Mississippi River Rivers of Dodge County, Wisconsin Rivers of Jefferson County, Wisconsin Rivers of Rock County, Wisconsin Rivers of Winnebago County, Illinois Rivers of Ogle County, Illinois Rivers of Lee County, Illinois Rivers of Whiteside County, Illinois Rivers of Rock Island County, Illinois

Cities and villages along the river

See also

References

External links