IRONMAN 70.3 Westfriesland 2027
Pancake flat Dutch racing with no shelter anywhere. A sheltered swim, exposed polder roads, and a flat run. The wind writes the result.
44 weeks to race day: base season
Plenty of runway. This far out, the win is a boring, consistent base rhythm: aerobic volume, strength, technique. The structured block starts closer in; what you do now decides how high it can climb.
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.
Build my complete road.
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.
“Flat does not mean easy in the Netherlands. There is no shelter on the polder roads, so ride to power or effort rather than to speed.”
The race
The course
One loop of the old harbour at Hoorn, surrounded by the old town. Enclosed harbour water with a short exit into transition, so no swell and nothing to fight.
One loop out of Hoorn into the surrounding countryside past the windmills. This is the Netherlands, so the profile is flat and the wind is the entire course. Ride the exposed sections by power, not by feel.
Through the historic centre past the monumental buildings and the docks, finishing at the Stadsstrand beside the old town. The official page does not state a lap count.
Not yet confirmed for this edition: run lap count, cut-off times, aid station spacing, water temperature. 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 Westfriesland course page on 13 August 2026. Courses change; the official page is always the last word.
Questions, answered
When is IRONMAN 70.3 Westfriesland 2027?
What distances can I race at IRONMAN 70.3 Westfriesland?
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 Westfriesland, Netherlands: Ben Bender, CC BY-SA 3.0, 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 Westfriesland 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.