ʻAu I Nā Mokupuni ʻEkolu is a group event- swimmers swim tandem-solos across each channel with a single time recorded for each crossing. The event committee makes every effort to select swimmers of comparable ability. The endurance challenge is for experienced swimmers looking to push their boundaries. Ocean conditions vary greatly and swimmers must expect to swim more than the linear distances recorded for each channel. In 2019, for example, swimmers swam over 36 miles (57.6 km) during the 3-day event due to strong currents.
New to 2021: Swimmers can choose to swim all 3 channels at once, departing from each arrival point and starting the next channel. Swimmers are allowed up to 10 minutes on land prior to departing for the second and third channels.
New to 2022: ʻAu I Nā Mokupuni ʻEkolu The Race. Swimmers race each other each day across each channel. The winner has the fastest cumulative time over the 3 day event.