IRONMAN Triathlon 70.3 Portugal - Cascais 2021. With its mild climate and 3,000 hours of sunshine per year, Portugal has long been a prime destination for family holidays. Thanks to a bumper IRONMAN weekend including an IRONMAN and IRONMAN 70.3 distance event, athletes can experience the best Cascais has to offer, starting with a swim in the most spectacular bay in Portugal. Follow up your race with a few days in Lisbon to complete your Portuguese adventure.