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Race IntelligenceKalmar, Sweden

IRONMAN Kalmar

Know your day before you race it.

Enter four numbers you already train with. You get a likely finish range, target paces and watts, and how I would race this course.

Race day
21 August 2027
Swim
3.8 km
Bike
180 km
Run
42.2 km

Published route evidence. Final 2027 route pending. Checked 15 Sept 2026.

Official course routeThe real GPS route for each discipline with official GPX data available, drawn in one shared coordinate space.

01 Race Card

Build my Race Card

Your first range uses conservative assumptions. Add optional evidence to make it more specific. It is calculated in your browser and saved only on this device.

Your numbers
Distance unit
Weight unit
You and this race
Sharpen your range with more detailOptional. Recent swim, bike and run results, equipment and transitions.

Add only the evidence you have. Every control changes a discipline range, its uncertainty, or an execution-risk explanation.

Swim evidence

Replaces the broad pool-to-open-water assumption.

Bike and equipment

These replace broad mass, aerodynamics, tyre, and power-to-speed assumptions.

Run evidence

A recent effort and honest durability/acclimation answers refine the post-bike run.

Race execution

Transition proficiency changes the T1/T2 range and how wet conditions are treated.

02 The course

What Kalmar actually gives you

You swim in Kalmar Sound, then ride one mostly flat loop from Kalmar across the exposed Öland Bridge and around Öland before returning to the mainland. The marathon is three loops through Kalmar's waterfront and historic centre. This is fast terrain when the wind cooperates, but the bridge crossing is the day-defining execution point.

Show distances in

Swim

3.8 km

Open-water Harbour Swim, One Loop

Layout
1 loop
Setting
Kalmar Sound

The protected Kalmar Sound provides a straightforward open-water start, but the absence of an official swim GPX leaves geometry unverified.

Source: 2026 current course

Bike

180 km

Flat, Exposed Island and Mainland Roads, One Loop

Layout
1 loop
Setting
Kalmar and the island of Öland via the Öland Bridge

A single loop crosses the exposed Öland Bridge twice and otherwise uses fast, mostly flat Swedish roads; wind, not climbing, is the main pacing variable.

Source: 2026 current course

Run

42.2 km

Flat City and Waterfront, Three Loops

Layout
3 loops
Setting
Kalmar waterfront and historic city centre

Three flat waterfront and city loops make pacing errors visible and reward even effort after the exposed bike.

Source: 2026 current course
Where these course facts come from

These facts come from the organiser’s latest published material: swim, 2026 current course; bike, 2026 current course; run, 2026 current course. They describe the character of the course. They do not confirm the final 2027 route.

03 Race plan

How I’d want you to race it

One job for each part of this course. The distance markers tell you when the job changes. The course tells you why.

Swim

Settle in Kalmar Sound

  1. 0–3800 m

    Kalmar Sound

    Settle without chasing unverified geometry

    The published swim description is a simple open-water start. Establish rhythm early and keep the opening effort controlled.

    • Seed honestly
    • Settle by 400 m

Bike

Cross Öland on effort

  1. 0 km–90 km

    Out to Öland

    Ride the bridge by power

    The first bridge crossing is exposed on both sides. Hold target power and accept a slower speed into the wind.

    • Cap power into the wind
    • Fuel before the bridge

  2. 90 km–180 km

    Return to Kalmar

    Use the second crossing as a check

    The return crossing and final mainland roads reward the same ceiling, not a late attempt to bank time.

    • Stay aero when sensible
    • Finish nutrition before T2

Run

Make three loops boring

  1. 0 km–14.07 km

    Loop one

    Let the waterfront feel easy

    The first of three flat loops should absorb the bike rather than display ambition.

    • Shorten stride out of T2
    • Take aid early

  2. 14.07 km–28.13 km

    Loop two

    Keep the same honest effort

    The repeated city and waterfront sections are a clear check that the bridge was paced correctly.

    • Compare effort, not split
    • Stay on nutrition

  3. 28.13 km–42.2 km

    Loop three to the finish

    Spend what the bridge left you

    Only make the final move once the first two loops have held together.

    • Decide late
    • Save something for the finish

04 Race week

What I would keep an eye on

There is no useful 2027 forecast this far out. For now, past race dates give us a point of reference. Closer to the race, the forecast will tell us whether the plan needs changing.

Forecast statusToo early for a forecast

A race-day forecast is not meaningful yet; check back closer to the event.

Temperature
14.3–24.1°CDew point centred on 12.9°C
Wind and gusts
11.5 km/hGusts up to 44.6 km/hPrevailing direction SW
Rain likelihood
Up to 75%Wet-surface uncertainty retained

Historical baseline, 2019–2025 · Open-Meteo historical archive · Updated 2026-09-15.Historical comparison only. This is not a forecast for 2027.

05 Method

What goes into your range

Your CSS, FTP, weight and run threshold create the first range. Open-water, bike, run and execution evidence can replace broad assumptions. Course data and the historical conditions baseline shape every simulation.

  1. Your numbersCSS · FTP · weight · run threshold
  2. This raceDistance · water type · elevation · exposure
  3. Your Race CardFinish and discipline ranges, with target paces and watts

Confidence is built from four inputs

Athlete evidence
Builds with recent open-water, bike and run efforts
Bike setup
Builds with equipment, mass, aero and tyre detail
Course evidence
Partial while the 2027 route is unconfirmed
Race-week conditions
Historical baseline until a forecast is useful
How the model works

It starts with the targets in your Race Card, then samples the parts of a full distance that vary: open-water pace, transitions, bike speed at the planned power, and the drop in run performance after the swim and bike. Repeating that calculation produces a likely range rather than a single heroic number.

The current time calculation uses this race’s published distances, or standard full distance distances where none are published, with the available course headings, elevation and exposure evidence. Weather scenarios vary temperature, dew point, wind, gusts, rain and water conditions together. Unknown route detail stays visible as uncertainty rather than false precision.

It is not predicting your exact finishing time, placing, or race-day weather. It answers a narrower question: given the plan and the information we have, what range of day is plausible, and where is the uncertainty coming from?

Confidence is not a permanent “low”. It is recalculated across four separate inputs:

  • Your evidence: consistent inputs and recent race-like swim, bike, and run results.
  • Bike setup: measured or specified aerodynamics rather than a broad prior.
  • The course: verified distance and route character, including elevation and technical sections.
  • The conditions: a current forecast is more useful than a historical comparison.

It starts low when those inputs are broad. It can become moderate or high as the evidence improves. A narrower range means better information, not a guarantee.

06 Next steps

If Kalmar is your race

Your range is built on today’s numbers. The months of training before race day decide what those numbers become.

The work from here.

Self-guided routeFull-distance training plansTraining plans for durable pacing.See the plans Personalised routeWork with me on the whole buildCoaching for joined-up race decisions.See coaching

Further reading

ArticleFull-distance race strategy: calm execution beats chaosPacing discipline for a long course with one defining exposure.

Evidence

Sources and verification

Course status: Partially verified. The organiser’s descriptions and latest published route profiles are in use. The final 2027 route is not yet confirmed. Last checked 2026-09-15.