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Näsijärvi

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Coordinates:61°34′N023°46′E / 61.567°N 23.767°E /61.567; 23.767

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Lake in Pirkanmaa, Finland

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Näsijärvi
Näsijärvi and Tammerkoski seen fromNäsinneula tower
Näsijärvi
Location	Pirkanmaa
Coordinates	61°34′N023°46′E / 61.567°N 23.767°E /61.567; 23.767
Primary outflows	Tammerkoski
Catchment area	7,672.29 km² (2,962.29 sq mi)
Basin countries	Finland

Max. length	40 km (25 mi)
Surface area	256.12 km² (98.89 sq mi)^[1]
Max. depth	63 m (207 ft)
Surface elevation	95.4 m (313 ft)^[1]

Settlements	Kuru,Tampere,Ylöjärvi
References	^[1]

Näsijärvi (Finnish:[ˈnæsiˌjærʋi]) is alake 95 metres (312 ft) above sea level, in thePirkanmaa region of southernFinland. Näsijärvi is the biggest lake in theTampere area at 256 square kilometres (99 sq mi) in size.^[2] The city of Tampere was built along theTammerkoski rapids, through which the lake drains intoPyhäjärvi. The water quality of the lake has improved as forest industry has decreased the amount of waste water.

The lake is divided into threefjards:Näsinselkä,Koljonselkä andVankavesi. Näsinselkä starts in the south from Tampere, where it expands to the west asLielahti and to the east asAitolahti. At the end of Aitolahti, it expands into a small Niihamanselkä, from which Olkahistenlahti diverges to the southeast and Merjanlahti and Laalahti to the northeast. To the north of Lielahti andLentävänniemi is Siivikkalanlahti and behind it Ryydynpohja. Näsinselkä changes to Koljonselkä in the north after the Iso-Otava Island. In the case of the islands, a wide headland protrudes from the east towards the lake, the southern tip of which is called Paavolanniemi. To the northeast, there is the five-kilometer-long Tervalahti with its bay Uskalinlahti. On the opposite shore of Näsinselkä is Laakonselkä, a bay that is more than four kilometers long and tapering. Between Koljonselkä and Vankavesi is anarchipelago, to the south of which the lake is crossed by theterminal moraine of the Inner Finland.^[3]

There are boat cruising services on Näsijärvi. In 1929, the steamerSS Kuru sinking in the lake, with at least 136 people drowning including the Member of the ParliamentIda Vihuri, remains the deadliest Finnish inland shipping disaster.^[4]

During the winter, usually during February and March, the lake is frozen in its entirety. Näsijärvi is then used forNordic walking, cross-country skiing, and everyday pleasure walking. There is a small, rocky island upon which a lighthouse, calledSiilinkari [fi], is located; it is the most popular walking destination on the lake.

In the north Näsijärvi has a wide catchment area that includes among others the lakesRuovesi,Kuorevesi,Keurusselkä,Tarjanne,Pihlajavesi,Toisvesi andÄhtärinjärvi.