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Open water competitions

Single Swim Utrecht9th June 2024Utrecht1200, 2000 or 5500m
De Mooie Nel Swim26th June 2024Haarlem1000, 2000 or 4000m
Swimming de Bosbaan30th June 2024Amsterdam, Bosbaan250 – 4000m
Triple 1K6th July 2024Tienehoven (Utrecht)3x 1000m
Het Y Openwater Wedstrijd21th July 2024Amsterdam, Gaasperplas250 – 7000m
LoveSwim26th July 2024Amsterdam, Amstel250 – 1500m
Rondje Pampus27th July 2024Muiden900, 1800 or 2700m
Zeemijl11th August 2024Bloemendaal½ or 1 sea mile (1852m)
Zwemtocht Maarsseveense Plassen22th & 24th August 2024Tienehoven (Utrecht)1000, 2000 or 4000m
IJsselmeer Zwemmarathon24th August 2024Stavoren/Medemblik22km
Beach to Beach Swim7th September 2024Texel/Den Helder6000m
Amstel Ice SwimDecember 2024Amsterdam, Jeugdland50 – 1000m

KNZB start license (required)

Do you want to participate in a competition? That is of course possible! However, it is important and necessary that your participation is reported to our national swimming association (KNZB). Depending the number of competitions you want to participate in, you can either choose a ‘day start’ license for each competition or a year-start license. It is obligatory for GSA to pay the license. If we do not do this, a fine will follow and will be passed on to you. So it is very important that if you want to participate, you let us know. We will then arrange a starting license for you. And you have to pay a small fee.

Would you like to request a starting license? Use the contact form below and we will contact you as soon as possible!


    Sex malefemale

    Date of birth

    Email address

    For which competition do you want to register?

    On which date the competition will be held?