Stadtzürcher Seeüberquerung

Participate: There will be 12 starting groups at the Seeüberquerung. All good swimmers aged 16 and over can take part. Youth (12 to 15 years) can join for free if accompanied by an adult (aged 18 years and older).
https://www.seeueberquerung.ch/en/#participate

Check-in: There is a mandatory check-in period and a start time for each ticket. During this check-in period you can get your bathing cap with start number at the entrance. If you miss check-in, you lose your start permission.