IRONMAN 70.3 Cascais 2026
An Atlantic bay swim at Cascais, a rolling bike into the Sintra hills, and a coastal run half an hour from Lisbon.
9 weeks to race day: a full block fits
This is the sweet spot. A complete 12-week recovery-led build fits inside the runway with room for a base phase in front. Anchor the block to race day and every week between now and then has a reason.
Building for this one? 70.3 training plan covers the sessions, the weekly shape and how the block is paced. The R.A.C.E. Framework explains why it is built that way.
Adapt my training to this course.
Commit to the date and the work gets a shape: your countdown starts, the emails arrive in step with your build, and the app anchors a recovery-led block so the final week lands exactly on race day.
One confirmation email, then the road begins. Registering for the race itself stays with the organiser.
“The Atlantic here has more movement than the Med, so practise swimming in swell. The bike into the Sintra hills is harder than the coastal photos suggest.”
The race
The course
One loop from Ribeira Beach around the protected bay to the Fortaleza at Clube Naval. The bay shelters you from the worst of the Atlantic, and the crowd is close enough on the shore to hear.
A single loop out along the Portuguese Riviera past Guincho Beach and into the Sintra-Cascais natural park. Scenic enough to distract you, and exposed enough on the Guincho stretch that the wind will remind you where you are.
Two loops from Cascais out along the Guincho road to Cabo Raso and back into town. It is a hard run in wind, and the passage through the Marina is where the noise is. Save something for the second lap.
Not yet confirmed for this edition: bike elevation gain, cut-off times, aid station spacing, water temperature history. We publish these only once they are on the official course page, so check there before you pace off anything here.
Maps © OpenStreetMap contributors. Routes from the official GPX.
Course details verified against the official IRONMAN 70.3 Cascais course page on 13 August 2026. Courses change; the official page is always the last word.
Questions, answered
When is IRONMAN 70.3 Cascais 2026?
What distances can I race at IRONMAN 70.3 Cascais?
How hard is the course?
What is the swim like?
How long do I need to train for it?
How do I enter?
Read before you race
IRONMAN 70.3 Tallinn Training Guide
How Much Harder Is a Full IRONMAN Than a 70.3?
IRONMAN Kalmar Swim Preparation for Open Water and Contact
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Photograph of Cascais, Portugal: Paul Morgan from Goostrey, Cheshire, United Kingdom, CC BY 2.0, via Wikimedia Commons. Not official race photography.
This listing is for information only. Unbroken is not affiliated with, endorsed by, or sponsored by IRONMAN 70.3 Cascais or its organiser. Details are based on publicly available information; names are used descriptively to identify the event. For accurate, up-to-date information and to enter, always use the official event website.