IRONMAN Portugal-Cascais is a premier triathlon event set against the stunning backdrop of the Portuguese Riviera, attracting athletes from around the globe each October. Competitors can take on either the full-distance IRONMAN—featuring a 3.8 km swim in the calm waters of Cascais Bay, a 180 km bike ride through coastal roads and the historic streets of Lisbon, and a 42.2 km run along the Atlantic shore—or the IRONMAN 70.3, which offers the same breathtaking scenery over half the distances (1.9 km swim, 90 km bike, 21.1 km run). The bike course is a standout highlight, passing landmarks such as Guincho Beach, Sintra-Cascais Natural Park, and even a loop around the iconic Estoril Formula 1 circuit. With its combination of challenging terrain, vibrant crowd support, and a rich cultural setting, the race is as much a celebration of endurance as it is of Portugal’s beauty and hospitality.
Race
Marathon
Race Date:
18 October, 2025
The full-distance IRONMAN Portugal-Cascais challenges athletes with a 3.8 km swim in the sheltered waters of Cascais Bay, a 180 km bike ride along the scenic Portuguese Riviera and historic Lisbon landmarks, and a 42.2 km coastal run to the finish near the iconic Cascais Fortress. Known for its breathtaking views and diverse terrain, it’s a true test of endurance on one of Europe’s most striking triathlon courses.
Weather based on historical averages.
FAQs
What is the IRONMAN Portugal-Cascais?
How long is the IRONMAN Portugal-Cascais?
Where does the IRONMAN Portugal-Cascais take place?
What is the elevation gain of the IRONMAN Portugal-Cascais?
How can I prepare for the IRONMAN Portugal-Cascais?
How do I choose the right training plan for the IRONMAN Portugal-Cascais?
The full-distance IRONMAN Portugal-Cascais challenges athletes with a 3.8 km swim in the sheltered waters of Cascais Bay, a 180 km bike ride along the scenic Portuguese Riviera and historic Lisbon landmarks, and a 42.2 km coastal run to the finish near the iconic Cascais Fortress. Known for its breathtaking views and diverse terrain, it’s a true test of endurance on one of Europe’s most striking triathlon courses.
The IRONMAN Portugal-Cascais is 42km long.
The IRONMAN Portugal-Cascais takes place in Cascais, Portugal.
The IRONMAN Portugal-Cascais elevation gain is 216 meters, which Runna classifies as a Rolling race.
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
What is the IRONMAN Portugal-Cascais?
The full-distance IRONMAN Portugal-Cascais challenges athletes with a 3.8 km swim in the sheltered waters of Cascais Bay, a 180 km bike ride along the scenic Portuguese Riviera and historic Lisbon landmarks, and a 42.2 km coastal run to the finish near the iconic Cascais Fortress. Known for its breathtaking views and diverse terrain, it’s a true test of endurance on one of Europe’s most striking triathlon courses.
How long is the IRONMAN Portugal-Cascais?
The IRONMAN Portugal-Cascais is 42km long.
Where does the IRONMAN Portugal-Cascais take place?
The IRONMAN Portugal-Cascais takes place in Cascais, Portugal.
What is the elevation gain of the IRONMAN Portugal-Cascais?
The IRONMAN Portugal-Cascais elevation gain is 216 meters, which Runna classifies as a Rolling race.
How can I prepare for the IRONMAN Portugal-Cascais?
The best way to train for the next race is to use a personalized training plan that takes into account your current running ability, schedule, and preferences.
This will help you steadily improve your running performance and get ready for the race without risking an injury.
Check out our training plans to find the best running program for your goals!
How do I choose the right training plan for the IRONMAN Portugal-Cascais?
Which plan you choose will depend on your experience, schedule, objectives, and the date of the race.
Runna offers personalized training plans for every runner and every goal: Whether this is your first, 10th or 100th race, we'll help you get the most out of your training and smash your goals.
Check out our training plans to find the best running program for your goals!
More
Sport:
Triathlon
Tags:
Ironman
Coastal
Team
Nature
Relay
This event listing is for informational purposes only. Runna is not affiliated with, endorsed by, or sponsored by IRONMAN Portugal-Cascais or IRONMAN Group. All event details are based on publicly available information and are provided solely to help users discover running events. Runna does not use any official logos, images, or proprietary content from this event or its organiser. Any trademarks or names mentioned are used descriptively to identify the event in a factual manner. For the most accurate and up to date information (including to register or purchase an entry to the event), please visit the IRONMAN Portugal-Cascais website.
