||This article needs attention from an expert in Finland. (February 2010)|
|Surface area||81,11 km²|
Jääsjärvi is a lake of Finland. The river Tainionvirta has its source from Jääsjärvi. Jääsjärvi flows through it and with several smaller lakes to Päijänne. Water in Jääsjärvi is bright. Lake is part of so-called Sysmän reitti.
Vehkasalo, Hirtesalo, Kotisalo, Ohrasaari, Urrionsaari ja Nautsalo.
- Finnish Environment Institute: Lakes in Finland
- Etelä-Savon ympäristökeskus: Saimaa, nimet ja rajaukset (Finnish)
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