Kilaån is a

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wate ...

primarily running through the southern parts of

Södermanland County Södermanland County ( sv, Södermanlands län) is a county or '' län'' on the southeast coast of Sweden. In the local Sörmlandic dialects it is virtually universally shortened and pronounced as Sörmlands län, or simply Sörmland, which is t ...

Sweden Sweden, formally the Kingdom of Sweden,The United Nations Group of Experts on Geographical Names states that the country's formal name is the Kingdom of SwedenUNGEGN World Geographical Names, Sweden./ref> is a Nordic country located on ...

. Its exodus is in south

Nyköping Nyköping () is a Urban areas in Sweden, locality and the seat of Nyköping Municipality, Södermanland County, Sweden with 32,759 inhabitants as of 2017. The city is also the capital of Södermanland County. Including Arnö, the locality on the ...

on the

Södermanland Södermanland ( or ), locally Sörmland, sometimes referred to under its Latin form ''Sudermannia'' or ''Sudermania'', is a historical province or ''landskap'' on the south eastern coast of Sweden. It borders Östergötland, Närke, Västmanla ...

coast. The river's mouth is only a few hundred metres from the larger river of

Nyköpingsån Nyköpingsån is a river primarily flowing through Södermanland County in Sweden. The river is named after Nyköping, where it flows into the Baltic Sea. Nyköping is also the largest settlement on the river proper and a large part of the drainage ...

. The peninsula of

Arnö Arnö is a locality situated in Nyköping Municipality, Södermanland County, Sweden with 3,871 inhabitants in 2010. Geography Arnö is situated on a peninsula on the south side of the bay, with Nyköping on the north side. Locally, Arnö is cons ...

and

Oxelösund Oxelösund is a locality and the seat of Oxelösund Municipality in Södermanland County, Sweden with 11,488 inhabitants in 2018. It is located less than south from the city centre of its larger neighbour Nyköping, with the two urban areas formin ...

is reached by crossing the small river, being only a few metres wide. The river passes by the rural localities of

Stavsjö Stavsjö is a locality situated in Nyköping Municipality, Södermanland County, Sweden with 212 inhabitants in 2010. Elections Stavsjö and Ålberga are the two main settlements of the Kila electoral ward. Riksdag The Riksdag (, ; also ...

Jönåker Jönåker is a locality situated in Nyköping Municipality, Södermanland County, Sweden with 617 inhabitants in 2010. Jönåker is known locally for being situated right on a steep hill by local standards and the trading house, the so-called "Kal ...

and

Bergshammar Bergshammar (pronunciation ''Bärjshammar'') is a locality situated in the Nyköping Municipality, Södermanland County Södermanland County ( sv, Södermanlands län) is a county or ''län'' on the southeast coast of Sweden. In the local Sörm ...

on its way through

Nyköping Municipality Nyköping Municipality ( sv, Nyköpings kommun) is a municipality in Södermanland County in southeast Sweden. Its seat is located in the city of Nyköping, which is containing a majority of the residents. Its southern tip in the district of Tuna ...

to the shoreline. It forms a sizeable river valley called ''Kiladalen'' in the last of its course, with elevated forests to its south and rolling hills to the north. The southern hills above the valley extend upwards of above sea level. The river is also relatively flat from the beginning of said valley, with the confluence of the Ålberga and Vreta rivers into the main Kilaån being at merely in spite of being at a distance from the river's mouth.

References

Rivers of Södermanland County {{Sweden-river-stub