So is swimming in the Aare river in Bern, Limmat and Sihl rivers in Zürich, and the Arve and Rhône in Geneva. Floating down in tubes is a popular summer pastime.
Arve + Rhone in Geneva Jonction = pretty spectacle from Jonction bridge, where two distinct waters meet - crystal-clear Rhone which comes down from limestone (majority) part of Alps, has time settle any silt in Geneva lake, so it has easily 15m visibility, jut like most seas.
On the other side, Arve coming down from France is muddied right at the source by Mont blanc range, which is mostly granite. You can see the exact spot where specific stream comes into play, very gray, and it doesn't get much better afterwards.
Its enough to get big river like Rhone dirty all the way to Mediterranean sea. Also, after Jonction Rhone becomes pretty cold to just swim in even in warmest summer days. But yes many tkae it down during summer on inflatables, including us.
On the other side, Arve coming down from France is muddied right at the source by Mont blanc range, which is mostly granite. You can see the exact spot where specific stream comes into play, very gray, and it doesn't get much better afterwards.
Its enough to get big river like Rhone dirty all the way to Mediterranean sea. Also, after Jonction Rhone becomes pretty cold to just swim in even in warmest summer days. But yes many tkae it down during summer on inflatables, including us.