Fyris

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The Fyris River in winter as seen from a hotel window in central Uppsala.

Fyris River in Uppsala (December 2007).

Fyrisån (in English, 'the Fyris river') is a river in the Swedish province of Uppland, which passes through the city of Uppsala and ends in Lake Mälaren.

It was formerly called the Full or the Sala river – Sala referred to the halls (Up-Salir) of the Swedish kings at Gamla Uppsala – but its name was changed in the 17th century in memory of the Fyrisvellir, marshy plains which had long since been turned to agriculture, but were famous from Norse mythology.

Boats can sail up the river from Lake Mälaren all the way to central Uppsala where two weirs make further progress impossible. In the summer of 2007 the construction of a fish ladder was started,^[1] in order to make it possible for the endangered and potamodromous fish species asp to pass the weirs, and reach its spawning waters. On the last day of April every year, students attempt to navigate the weirs on homemade rafts with predictable results.