You can parti­cip­ate in a data­thon by navig­at­ing via the over­view list (“Datathons” > “Datathons”) to the detail page of a data­thon and using the “Join Datathon” button there.

There are two options to parti­cip­ate: As a single person or as a team. As an indi­vidual, all you have to do is indic­ate that you want them to choose this option. A team must be created in advance through the “Datathon” > “Create a Team” dialog. When the required inform­a­tion is filled in, your team is created and you can parti­cip­ate in the data­thon by enter­ing the team name.