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Jääsjärvi facts for kids

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Jääsjärvi
From the edge of Jääsjärvi starts the Tainionvirta River
Location Hartola and Joutsa
Coordinates 61°36′N 26°07′E / 61.600°N 26.117°E / 61.600; 26.117
Type Lake
Catchment area Kymijoki
Basin countries Finland
Max. length 10 km (6.2 mi)
Max. width 15 km (9.3 mi)
Surface area 81.11 km2 (31.32 sq mi)
Average depth 4.58 km (2.85 mi)
Max. depth 28.2 km (17.5 mi)
Water volume 0.372 km (0.231 mi)
Shore length1 303.73 km (188.73 mi)
Surface elevation 92.3 km (57.4 mi)
Frozen December–April
Islands Vehkasalo, Hirtesalo, Kotisalo, Ohrasaari, Urrionsaari, Nautsalo
1 Shore length is not a well-defined measure.


Jääsjärvi is a large lake in Finland. It covers 81.11 square kilometres (31.32 sq mi). It has many islands. The largest ones are Vehkasalo, Hirtesalo, Kotisalo, Ohrasaari, Urrionsaari and Nautsalo.

Municipalities near Jääsjärvi are Joutsa and Hartola. Jääsjärvi flows from the southwestern part via Tainionvirta and into several smaller lakes to Päijänne.

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