IXTRI 2026

The IXTRI Iroise Cross Triathlon offers an unparalleled adventure blending swimming, gravel cycling, and nature trail running. Set amidst the stunning landscapes of Fort de Bertheaume to Pointe Saint-Mathieu, this unique triathlon challenges participants with diverse terrains that showcase the breathtaking coastal scenery of Brittany.
Two formats are available: individual or team participation (teams can consist of 2 or 3 members for relay events). The course includes a 1000-meter swim in clear waters, followed by a dynamic 22-kilometer gravel cycling route. Participants then tackle an invigorating 8-kilometer nature trail run.
More than just competition, the event embraces a convivial and inclusive approach, respecting both natural and historical heritage. It celebrates Brittany’s rich landscape while fostering community engagement through its partnership with Les Marchands de Sable—a local association dedicated to comforting hospitalized children in Brest by providing them with reading sessions and age-appropriate activities.
For those looking to join or form teams for the relay event, an easy-to-use platform is available. Fill out this simple registration form: [link] to connect with potential teammates or see who’s already seeking a team. Whether you’re a swimmer, cyclist, or runner, there's surely a group waiting just for you.
Supporting Les Marchands de Sable through your participation adds an extra layer of meaning to the experience. By joining this event, runners not only challenge themselves but also contribute positively to their community and the well-being of children in need.
For more information on how to get involved as a volunteer or find teammates: [link]