ÖTILLÖ Colorado USA

ÖTILLÖ Colorado USA unfolds in the Fort Collins area, using Horsetooth Reservoir and Lory State Park for a swimrun playground of lakes, ridges, and forest trails. The event offers three formats: Colorado Experience (6 miles total; 1.5-mile swim + 4.5-mile run; ~89 m elevation), Colorado Sprint (11 miles; 3-mile swim + 8-mile run; ~288 m), and Colorado World Series (23.5 miles; 5-mile swim + 18.5-mile run; ~637 m). Runners navigate open-water swims in the reservoir interspersed with rugged trail sections, delivering scenic, technical, and physically demanding courses.

Categories include team and solo divisions, with mandatory gear and on-site awards on finish. Visit the organization's website for the most recent information.