“A total immersion in the heart of the Landes region, an extraordinary challenge reserved for seasoned teams with expertise in ocean and long-distance swimming. Designated an ÖTILLÖ Merit Race in 2026, this event allows participants to collect points for the official swimrun ranking and paves the way to the legendary ÖTILLÖ Swimrun World Championship, the foundational race and a global benchmark. Between the powerful Atlantic Ocean, lakes, and Landes forests, this demanding course embodies the very essence of endurance swimrun. The race is open to participants aged 18 and over, with mandatory experience in long-distance swimrun and essential mastery of ocean swimming in 1.5-meter swells.”