Kilaån is a

river A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...

primarily running through the southern parts of

Södermanland County Södermanland County (, ) is a Counties of Sweden, 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 the ...

Sweden Sweden, formally the Kingdom of Sweden, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. It borders Norway to the west and north, and Finland to the east. At , Sweden is the largest Nordic count ...

. 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 ( ), locally Sörmland, sometimes referred to under its Latinisation of names, Latinized form Sudermannia or Sudermania, is a Provinces of Sweden, historical province (or ) on the south eastern coast of Sweden. It borders Österg� ...

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 consi ...

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 form ...

is reached by crossing the small river, being only a few metres wide. The river passes by the rural localities of Stavsjö, Jönåker and Bergshammar on its way through

Nyköping Municipality Nyköping Municipality () is a municipalities of Sweden, municipality in Södermanland County in southeast Sweden. Its seat is located in the city status in Sweden, city of Nyköping, which is containing a majority of the residents. Its southern t ...

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