Taking place on November 9, 2025, the Duatlo de Ílhavo is a sprint-format duathlon (run-bike-run) held in the coastal city of Ílhavo. It is part of the Desafio Triatlo Norte series and offers both a competitive and recreational experience for individual athletes and relay teams. Open to participants aged 16 and up, the race promotes broad inclusivity across genders, ages, and categories, including paratriathletes. The event unfolds around the city center, starting at Jardim Henriqueta Maia and passing landmarks like the municipal pools and the Parque da Ciência e Inovação.