Participants traverse through a pre-marked course in nature alternating between running and swimming. Swim legs may consist of long open ocean swims, rocky rivers or crystal-clear lakes while runs are on anything from roads, fire trails, technical rock scrambles or whatever nature puts in front of you. Athletes typically participate as a two-person team of men, women or mixed but individual options are also available.
As a team, you must remain within 10-meters of each other, this is not a relay. You share the experience, the fun, the beauty and the suffering.