Längelmävesi (Finnish pronunciation: [ˈlæŋːelmæˌʋesi]) is a lake in southwestern Finland. The lake is located mostly in the Pirkanmaa region at an elevation of 84.2 metres (276 ft). Längelmävesi is within the municipalities of Jämsä (formerly Längelmäki), Kangasala (formerly Sahalahti), Kuhmalahti, and Orivesi.^[1]

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Quick Facts Längelmävesi, Location ...

Längelmävesi
Regional road 325 crossing Lake Längelmävesi near Sahalahti.
Längelmävesi
Location	Kokemäenjoki drainage basin
Coordinates	61°34′N 024°25′E
Basin countries	Finland
Surface area	133.04 km2 (51.37 sq mi)
Average depth	6.83 m (22.4 ft)
Max. depth	59.3 m (195 ft)
Water volume	0.909 km3 (737,000 acre⋅ft)
Shore length1	496.95 km (308.79 mi)
Surface elevation	84.2 m (276 ft)
Frozen	December–April
Islands	Isosaari, Mäntysaari, Eräsalo, Mäkelänsaari
Settlements	Längelmäki, Kangasala, Kuhmalahti, Orivesi, Jämsä, Sahalahti
References	[1]
1 Shore length is not a well-defined measure.

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Längelmävesi lake is part of the Kokemäenjoki drainage basin (watershed). It is one of a chain of lakes (Längelmäveden reitti) that includes Längelmävesi, Vesijärvi, Roine, Pälkänevesi, and Mallasvesi lakes. This chain of lakes drains into the Vanajavesi in Valkeakoski.

From the southeast, another chain of lakes (Hauhon reitti), consisting of Lummene, Kuohijärvi, Kukkia, Iso-Roine, Hauhonselkä, and Ilmoilanselkä lakes joins into the Vanajavesi.

In Finnish, the former chain of lakes is called Längelmäveden reitti and the latter Hauhon reitti as it runs through the former municipality of Hauho.

In Finnish culture, Längelmävesi and Roine lakes are well known — as they are mentioned in the famous poem "En sommardag i Kangasala" (Finnish: Kesäpäivä Kangasalla) by Zachris Topelius and have thus became part of Finnish national landscape imagery.

• List of lakes in Finland