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Race IntelligenceAlmere, Netherlands

Challenge Almere-Amsterdam

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
11 September 2027
Swim
3.8 km
Bike
180 km
Run
42.2 km

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

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 Almere-Amsterdam actually gives you

You swim two calm laps of the Weerwater by Almere's Kunstlinie theatre, ride two flat polder laps below sea level, then run a marathon built from an opening lap, four 10.1 km laps and a closing stretch through the city and past the lake. Nothing about the terrain will slow you down over 226.2 km combined. The wind on two bike laps and pacing a marathon built from repeated short loops are what decide whether that turns into a good day.

Show distances in

Swim

3.8 km

Lake

Layout
2 loops
Setting
Weerwater, Almere Stad

Two calm laps of a sheltered city lake remove open-water exposure and keep navigation simple across the full 3.8 km.

Source: current course description

Bike

180 km

Flat Polder Roads

Layout
2 loops
Setting
Flevoland's polders, below sea level
Elevation
232 m published profile difference

Flat, below-sea-level polder terrain removes climbing cost entirely across two laps, so wind on the open roads becomes the whole variable, twice over.

Source: current course description

Run

42.2 km

Flat City and Lakeside

Layout
opening 900 m lap, four 10.1 km laps, closing 900 m stretch
Setting
Almere's city centre and the Weerwater
Elevation
88 m published profile difference

A marathon built from repeated short laps through the city and past the lake favours rhythm; the loop structure gives constant feedback on how the day is actually going.

Source: current course description
Where these course facts come from

These facts come from the organiser’s latest published material: swim, current course description; bike, current course description; run, current course description. 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 into a long day, twice around

  1. 0–3800 m

    Two loops of the Weerwater

    Use the sheltered water to settle in for the day ahead

    Two counterclockwise loops in calm city water give you a controllable opening to a long day. Hold the same effort on both loops rather than letting the second drift.

    • Settle by 400 m
    • Match loop two's effort to loop one

Bike

Ride the wind the same way, lap after lap

  1. 0 km–90 km

    Lap one of the polder

    Ride the first lap like there's a second one coming

    The course moves quickly from Lumierepark onto Flevoland's flat, open polder roads. This lap repeats, so ride it at a number you can hold twice, not once.

    • Start drinking before the open roads
    • Check effort before average speed

  2. 90 km–170 km

    Lap two

    Let the wind move the speed, not the effort

    This course has almost no elevation to manage, so the wind across the open polder is effectively the entire bike variable, now for the second time. Keep the same effort whether it is helping or fighting you.

    • Ride the plan by power or perceived effort
    • Do not bank a tailwind split

    A flat course still punishes a headwind spent chasing lost time, twice over

  3. 170 km–180 km

    Back towards Almere

    Arrive ready for a marathon that starts in a crowd

    As the second lap closes back towards the city, stop chasing speed. Finish your planned nutrition and get the legs turning over before a run that puts you straight into noise.

    • Finish the bottle you planned
    • Let cadence rise before T2

Run

Use every lap as a checkpoint, not a finish line

  1. 0 km–0.9 km

    Opening lap

    Find your legs before the crowd finds your pace

    A short 900 m opening lap leaves Lumierepark straight into the crowd Challenge Family markets as making every finisher feel like a hero. Use it to convert bike legs into running legs, not to bank on the atmosphere.

    • Shorten your stride out of T2
    • Let the opening lap feel slow

  2. 0.9 km–21.3 km

    Laps one and two of four

    Treat each 10.1 km lap as its own checkpoint

    The four main laps past the same lake and streets give you repeated, honest feedback on how the day is really going. Hold your planned pace through the first two rather than reacting to how you feel on any single lap.

    • Compare each lap to the last, not to a target time
    • Keep fuelling on schedule

  3. 21.3 km–41.3 km

    Laps three and four

    Only race once you've earned it

    If the first half of the run has gone to plan, decide deliberately whether to push through the final two laps. If it hasn't, protect the finish rather than forcing it.

    • Make the push decision after lap three, not mid-lap
    • Keep the finish decision yours, not the crowd's

  4. 41.3 km–42.2 km

    Closing stretch

    Spend what's left on the Esplanade

    The final 900 m stretch finishes on the Esplanade in front of the day's biggest crowd. Spend whatever you've held in reserve here, not before.

    • Save something for the finish straight

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
12.9–22.8°CDew point centred on 13.0°C
Wind and gusts
12.9 km/hGusts up to 45.7 km/hPrevailing direction SW
Rain likelihood
Up to 85%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 Almere-Amsterdam 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 the fitness and durability this course asks for.See the plans Personalised routeWork with me on the whole buildCoaching when you want the plan, feedback and race decisions joined up.See coaching

Further reading

ArticleFull-distance race strategy: calm execution beats chaosThe pacing and fuelling discipline a repeating-lap course like this asks for.ArticleFix the first ten minutes off the bikeUseful before a marathon that puts you straight into Almere's crowds out of T2.

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.