IRONMAN Triathlon 70.3 Alcúdia-Mallorca 2021. Fancy a beautiful course through scenic Spanish island villages and sweeping ocean views? The balearic island of Mallorca is not only a training paradise for triathletes from around the world, but also host to one of the largest IRONMAN 70.3 events in the world, the Zafiro IRONMAN 70.3 Alcúdia-Mallorca. A fast course in magnificent sunny Mallorca, this race has been a global favourite for over a decade.