IRONMAN 70.3 Wisconsin, Madison, Wisconsin, USA
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IRONMAN 70.3 Wisconsin 2026

Madison, Wisconsin, USA
12 September 2026 Triathlon 70.3 The HelixCapitol finishHalf of the full

One lap of Lake Monona, a 56-mile tour of Madison, and an out-and-back run finishing in front of the State Capitol. Same weekend as the full.

Terrain
Road
Madison and the surrounding country
Elevation
Rolling
Rolling around Madison, flat run
Swim
Lake
Lake Monona, fresh water, one lap
Wetsuit
Wetsuit-legal
usually 21-23°C
Region
Wisconsin
Madison, Wisconsin, USA
Your runway

4 weeks to race day: the sharpening window

A full build no longer fits, but a sharp one does. This close in, the job is specificity and freshness: race-pace touches, open-water or brick rehearsal, and a taper your nervous system actually absorbs. No heroics; arrive fresh.

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.

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.

Road to Race

Start my Road to IRONMAN 70.3 Wisconsin.

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.

Already have the app, or want it? The app takes this race and builds the block around it.
Abraham Spring, founder of Unbroken

“The half runs the day before the full at Madison, on the same lake and the same Helix. If the full is next year's plan, this is the reconnaissance trip.”

Abraham Spring: founder, Unbroken

The race

The half at Madison shares its lake, its Helix and its weekend with IRONMAN Wisconsin, which makes it the obvious reconnaissance race if the full is on next year's plan. The swim is one clockwise loop of Lake Monona from Law Park Beach with buoys every 100 yards, then up the spiral Helix ramp into transition at Monona Terrace. The bike is a 56-mile tour of Madison and the surrounding country. The run is an out and back through downtown finishing in front of the Capitol. IRONMAN publishes noticeably less detail about this course than most, and where they say nothing we say nothing.

The course

No course maps for this race. IRONMAN publishes no downloadable route for any leg of this race, only a live tracker that runs on race day, so there is nothing to draw a course map from. Everything below comes from the official course page, checked on the date at the foot of this section.

Swim1.2 mi 1.9 km
One lap

One clockwise loop of Lake Monona from Law Park Beach to the concrete boat ramp, with buoys every 100 yards so sighting is straightforward. Rolling start, self-seeded by your estimated swim time. Then you run up the Helix into T1.

Bike56 mi 90.1 km
Lap count not published

A 56-mile tour of Madison and the country around it. The official page describes it in one sentence and states neither a lap count nor an elevation figure, so neither appears here.

Run13.1 mi 21.1 km
Lap count not published

An out and back through downtown Madison finishing in front of the Capitol building. The official page does not state a lap count.

T1At Monona Terrace. You finish the swim and run up the Helix, the spiral car ramp, to reach it.
T2Ride back up the Helix and into the same transition.
Typical race day11–26°C air · 22°C water

Not yet confirmed for this edition: bike lap count, run lap count, bike elevation gain, cut-off times, water temperature history. We publish these only once they are on the official course page, so check there before you pace off anything here.

Course details verified against the official IRONMAN 70.3 Wisconsin course page on 14 August 2026. Courses change; the official page is always the last word.

Questions, answered

When is IRONMAN 70.3 Wisconsin 2026?

IRONMAN 70.3 Wisconsin takes place on 12 September 2026.

What distances can I race at IRONMAN 70.3 Wisconsin?

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. Rolling around Madison, flat run

What is the swim like?

Lake Monona, fresh water, one lap. Wetsuit-legal, usually 21-23°C. Practise open water before race week, not during it.

How long do I need to train for it?

Race day is 12 September 2026. For the 70.3, a proper recovery-led build wants about 12 weeks, which means starting around 20 June 2026. Later starts still work: the block compresses honestly rather than pretending, and it always anchors to the exact race date.

How do I enter?

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

Read before you race

Race Week Is Where People Unravel.

Eleven months of good work, then seven days of panic. Almost everything that goes wrong in race week is somebody trying to help themselves.

Photograph of Madison, Wisconsin, USA: TravelingOtter from Houston, Texas, USA, CC BY-SA 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 Wisconsin 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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