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Race IntelligenceMontréal, Canada

Challenge Montréal

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
12 September 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 Montréal actually gives you

You swim one calm loop in the Olympic Basin, ride a smooth, closed multi-lap course on the legendary Circuit Gilles-Villeneuve, then run flat parkland past the site of the 1976 Olympic Games to a finish overlooked by the Biosphère. Every discipline here is about as controlled as triathlon gets. The only thing standing between you and a fast day is whether you ride the plan or ride the racetrack.

Show distances in

Swim

1.9 km

Calm Basin

Layout
1 loop
Setting
the Olympic Basin, Parc Jean-Drapeau

A calm, purpose-built Olympic rowing basin is about as controlled as open-water swimming gets.

Source: current course description

Bike

90 km

Closed Racetrack Circuit

Layout
multi-lap
Setting
Circuit Gilles-Villeneuve, home of the Canadian Formula 1 Grand Prix
Elevation
108 m published profile difference

A closed, smooth F1 racetrack removes both climbing and traffic risk, leaving disciplined pacing as the only real variable on what the organiser calls the fastest bike course in the country.

Source: current course description

Run

21.1 km

Flat Parkland

Setting
the 1976 Olympic Games site on Île Notre-Dame, finishing near the Biosphère
Elevation
22 m published profile difference

Low elevation and flat parkland favour rhythm on a course with genuine landmark appeal (the Biosphère) that rewards staying focused on pace.

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 basin

  1. 0–1900 m

    One loop of the Olympic Basin

    Let a purpose-built basin work for you

    A calm, sheltered rowing basin gives you about as controlled a swim as exists in triathlon. Settle into rhythm early and use the still water to your advantage.

    • Settle by 300 m
    • Sight off fixed landmarks around the basin

Bike

Ride the plan, not the racetrack

  1. 0 km–45 km

    Early laps

    Get organised on a course built for speed

    The smooth, closed Circuit Gilles-Villeneuve removes traffic and surface risk, but that same smoothness makes it tempting to ride faster than planned from the start.

    • Check effort before average speed
    • Start fuelling early, while it's easy to forget on a fast course

  2. 45 km–90 km

    Later laps

    Hold the plan on the fastest bike course in the country

    Nothing about this circuit will slow you down, which is exactly why holding planned effort matters more here than on a harder course.

    • Ride the plan by power or perceived effort
    • Finish your nutrition before T2

Run

Hold it to the Biosphère

  1. 0 km–10.55 km

    Onto Olympic parkland

    Find your legs on the 1976 Games site

    The flat run through Parc Jean-Drapeau's Olympic parkland gives you an honest, low-technicality read on how the bike went. Use the first half to convert bike legs into running legs.

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

  2. 10.55 km–21.1 km

    Towards the Biosphère

    Finish under the Biosphère on purpose

    Use the first half as honest evidence before committing to a real push towards the finish overlooked by the Biosphère.

    • 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
12.2–23.5°CDew point centred on 12.4°C
Wind and gusts
10.2 km/hGusts up to 39.2 km/hPrevailing direction WSW
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 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 Montréal 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.ArticleMarginal gains in triathlon: a costly mythUseful perspective before a course that tempts athletes to chase speed simply because the racetrack allows it.

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.