Päijänne

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Päijänne
Coordinates	61°35′N 25°30′ECoordinates: 61°35′N 25°30′E
Primary outflows	Kymi River
Basin countries	Finland
Max length	120 km
Surface area	1,080 km²
Average depth	16.2 m
Max depth	95.3 m
Surface elevation	78.39 m
Islands	1886 (Virmailansaari, Salonsaari, Judinsalo, Onkisalo, Paatsalo, Muuratsalo, Haukkasalo ja Vuoritsalo)

Päijänne (IPA: /pæijænːe/) is the second largest lake in Finland (1,080 km² water area). The lake drains into the Gulf of Finland via the Kymi River. The major islands are Virmailansaari, Salonsaari, Judinsalo, Onkisalo, Paatsalo, Muuratsalo, Haukkasalo ja Vuoritsalo. An underground aqueduct connects the lake to Helsinki, providing the capital area with water (see Päijänne Water Tunnel).