The Lake Como measures 146 square kms and is the third biggest Italian lake after Lake Garda and Lake Verbano.
It has a characteristic upside-down Y shape with Colico to the north Lecco to the south-east and Como to the south-west. Its perimetre measures 170kms.
The maximum length between Como and Gera Lario is 50km; the maximum width between Fiumelatte and Cadenabbia is 4.4km; the minimum width between Careno and Toriggia measures 650mts; its maximum depth of 410 metres between Argegno and Nesso makes it the deepest of all the European lakes; its average above-sea level is 199mts.
The lake is entirely surrounded by mountains, the highest being Monte Legnone (2609mt) above Colico.
There are 37 rivers flowing into the lake the most important being the Adda followed by the Mera.
The Adda is also its only outlet. It flows out through Lecco and after having formed the lakelets of Garlate and Olginate it continues towards the Po river.
The only island of the lake is Isola Comacina, situated in the Como branch of the lake opposite the commune of Sala Comacina.
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