ÖTILLÖ Swimrun World Series is one of the most respected global endurance properties, blending open-water swimming and trail running across rugged terrain. Founded in Sweden and now spanning three continents, the series runs 15+ international events each year, including stops in the US, Canada, Sweden, and France. The audience is affluent, global, and fiercely loyal, skewing male (63/37), traveling thousands of miles to compete and investing heavily in gear and lifestyle brands, with the series reaching an estimated 1M social impressions and a 66K social following. Partners get branding on athlete bibs, swim caps, and finish-line architecture, plus inclusion in ÖTILLÖ's email campaigns, embedding a brand within a values-driven community built around sustainability and endurance.