Before registering please read the following contents. It will make the registration process simpler:



Add to the shopping basket all the challenges that you want to register. If you need more information, contact us through: Also take advantage of the discounted price for the first people to sign up:

Medical certificate

This document must be presented at the time of collecting the swimming bag. The certificate must be filled out by a qualified doctor. (Download PDF)



Several swimmers can be registered at once. To do this you must have (1) their email address if they are a registered user or (2) all of the personal details of each of the new users.



You can register 1 or more Kids during the same purchasing process. If the child has already been registered on a previous occasion, simply entering their username is enough. It is important to log in and check that the contact details are still valid.

If they are a new Kid you must enter all of their details, register them in the relevant group and enter contact details for the person responsible for them during the event.



If you want to participate as a volunteer you can do so as follows:

(1) Select the MARNATON eDreams challenge in which you want to participate.

(2) Choose how you would like to help out: as a doctor, support organising the start, support organising the finish, refreshment stations, support in the sea with your own boat, Marnaton Kids, kayaker, photographer, other.

(3) Enter your details or email address if you are already registered.

A few weeks before the event the MARNATON team will contact you to organise your assistance.

Thanks for signing up!


Register kids in adult events

To authorize a kid to swim in adult events you must send the parental authorization and the Sport Curriculum to before making the registration process (download these 2 PDF). Parental authorization  Sport Curriculum


Certificate for swimming without neoprene

This document must be duly completed at the time of collecting your number or send by email before the registration closed to (Download PDF)


Poncho Nonbak MARNATON

Conditions of the promotion:

  • It is essential that just one participant signs up for the 4 challenges.

  • Registration for the 4 challenges must be made in the first 48 hours from the opening of registration (from Wednesday 15th of February at 12h until Friday 17th of February at 12h) and the purchase must be made in one transaction.

  • The 4 entries must be one in Barcelona, one in Begur, one in Sant-Feliu de Guíxols and one in Cadaqués (for any distance).

  • If you sign up for the 4 challenges after the end of the promotion, Friday 17th of February at 12h, you will not be able to benefit from it.

  • This promotion is not open to Kids.

  • The poncho will be delivered during the 4th eDreams MARNATON Barcelona by VW California on the 6th of May.

We use cookies to ensure the correct operation of our web portal, improving the safety and effectiveness for a higher and a customization of the services we offer to users. If you continue browsing or you press your "OK" button we will consider that you accept all its use.