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Race IntelligenceTaitung, Chinese Taipei

Challenge Taiwan

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
24 April 2027
Swim
1.9 km
Bike
90 km
Run
21.1 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 Taiwan actually gives you

You swim one loop in a calm, purpose-built reservoir near Taitung, ride an undulating coastal road between the Carp Mountains and the Pacific Ocean, then run through Taitung's cultural heart, Pipa Lake Park and surrounding farmland to an ocean-promenade finish. The bike's rolling coastline is genuinely beautiful and genuinely variable. The run's changing scenery is the same kind of test in a different form: hold your effort, don't chase the view.

Show distances in

Swim

1.9 km

Man-made Freshwater Reservoir

Layout
1 loop, anticlockwise from a pontoon start
Setting
a reservoir near Taitung

A calm, purpose-built reservoir with clear, mild-temperature water keeps the swim controlled.

Source: current course description

Bike

90 km

Undulating Coastal Road

Setting
between the Carp Mountains and the Pacific Ocean, via ZhongHua Bridge, XiaoYeLiu and Doulan

An undulating coastal road between mountains and ocean rewards even effort over chasing the scenery.

Source: current course description

Run

21.1 km

Cultural City, Lakeside Park and Rural Farmland

Setting
Taitung city, Pipa Lake Park, and the surrounding rice fields and orchards, finishing on the ocean promenade

A varied route through city, lakeside park and farmland gives constant scenery changes that can distract from pacing.

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

Use the calm reservoir

  1. 0–1900 m

    One loop from the pontoon

    Use calm, clear water to settle early

    A calm freshwater reservoir with clear water and mild temperatures gives you a controlled swim. Settle into rhythm from the pontoon start.

    • Settle by 300 m
    • Sight off the turn buoys

Bike

Hold effort through the rollers

  1. 0 km–45 km

    Out along the coast

    Ride the rollers to a plan, not a view

    The road between the Carp Mountains and the Pacific is undulating and genuinely scenic. Hold your planned effort through the rollers rather than surging for the views.

    • Check effort before average speed
    • Start fuelling early on the exposed coastal stretches

  2. 45 km–90 km

    Doulan and the return

    Hold the same effort through the return

    As the route rolls through Doulan and turns back towards Taitung, keep the same effort you set on the way out.

    • Ride the same number in both directions
    • Finish your nutrition before T2

Run

Let the scenery pass, not the pace

  1. 0 km–10.55 km

    Through Taitung and Pipa Lake Park

    Let the cultural heart be scenery, not pacing

    The run's opening kilometres pass through Taitung's cultural centre and the tranquil Pipa Lake Park. Use them to find running legs, not to get swept up in the surroundings.

    • Shorten your stride out of T2
    • Take the early aid stations deliberately

  2. 10.55 km–21.1 km

    Rice fields, orchards and the promenade

    Finish on the ocean promenade with a decision earned

    The route through rural farmland to the ocean promenade finish gives you clear feedback before the final kilometres. Decide deliberately whether to push.

    • Compare the second half to the first honestly
    • Keep the finish decision yours

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
23.0–28.9°CDew point centred on 21.1°C
Wind and gusts
7.8 km/hGusts up to 42.8 km/hPrevailing direction ENE
Rain likelihood
Up to 95%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 70.3 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 70.3 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 Taiwan 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 routeHalf-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

ArticleHow to pace a 70.3 so you can still runThe longer version of the swim-bike-run pacing logic behind this Race Card.ArticleBig gear done right: a guide to low-cadence strengthUseful preparation for an undulating coastal bike course.

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.