IRONMAN 70.3 Cascais, Cascais, Portugal

IRONMAN 70.3 Cascais 2026

Cascais, Portugal
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17 October 2026 Triathlon 70.3 Late seasonAtlantic swimNear Lisbon

An Atlantic bay swim at Cascais, a rolling bike into the Sintra hills, and a coastal run half an hour from Lisbon.

Terrain
Road
Atlantic coast road and Sintra hills
Elevation
Rolling
· The Sintra climbs are real
Swim
Sea
Atlantic in Cascais Bay
Wetsuit
Wetsuit-legal
usually 18-20°C
Region
Portugal
Cascais, Portugal
Your runway

10 weeks to race day: a full block fits

This is the sweet spot. A complete 12-week recovery-led build fits inside your runway with room for a base phase in front. Anchor the block to this date and every week between now and then has a reason.

R
Recover
Fix the nervous system first. Sleep, HRV, and the noise out.
A
Align
Fit the plan to your actual life, not the one you wish you had.
C
Condition
Minimum effective dose. The right sessions, done fresh.
E
Execute
Race-week protocol, pacing, contingency. Nothing new on race day.
Predict your finish time The 70.3 training plan

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.

Abraham Spring, founder of Unbroken

“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.”

Abraham Spring: founder, Unbroken

The race

Cascais gives you a proper Atlantic swim rather than a flat Mediterranean one, so expect some swell. The bike climbs into the Sintra hills before returning along the coast, which makes it rolling rather than fast. The run is along the seafront and marina. Being twenty five minutes from Lisbon makes it one of the easiest European races to turn into a family trip.

Questions, answered

When is IRONMAN 70.3 Cascais 2026?

IRONMAN 70.3 Cascais takes place on 17 October 2026.

What distances can I race at IRONMAN 70.3 Cascais?

70.3. Pick the distance that fits your training runway, not your ego: the right distance is the one you can arrive at fresh.

How hard is the course?

Road terrain, rolling profile. The Sintra climbs are real

What is the swim like?

Atlantic in Cascais Bay. Wetsuit-legal, usually 18-20°C. Practise open water before race week, not during it.

How long do I need to train for it?

From today you have 10 weeks. A compressed but complete build fits if you start now.

How do I enter?

Entries are handled by the organiser. Use the Register button above: it goes straight to the official site.

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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.

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