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A path along the Allier at Vichy, with the Lac d'Allier beyond.
Race Finder

IRONMAN Vichy.
Your best day in Vichy.

Vichy can feel gentle in the water and demanding on the bike. Lac d'Allier leads into the rolling Montagne Bourbonnaise before a full marathon through the city and along the river. That's a hard day to rescue after an overambitious climb.

Vichy, the Allier from the Parc Napoléon III.

Race day
22 Aug 2027
Course
Swim 3.8 km · Bike 180 km · Run 42.2 km
Historical air
16–29°C

What could you race?

I’m Tom, the coach behind Sense Endurance Coaching. Tell me where you are now and I’ll show you what a strong day in Vichy could look like.

Let’s build your race

Let’s build your race.

Your age and race category help me estimate where that performance could place you. They don’t determine how fast I think you can race.

Change units

The Bourbonnaise hills are where you protect the Allier marathon.

The earlier full-distance Vichy race moved from the calm Allier swim into the Montagne Bourbonnaise before returning for a marathon along the water and through Parc des Sources. Those hills reward judgement, not a search for every lost second. The 2027 course still needs the full-distance map.

Lac d'Allier, opening full swim

Swim economically rather than chasing the first buoy

A single calm loop of the Allier River at first light gives a controlled, low-resistance opening. Settle into a pace you can hold for the whole 3.8 km.

Settle by 400 m. Breathe on a fixed pattern.

Lac d'Allier, final swim approach

Keep breathing composed towards transition

The fast opening kilometres along the Allier and across the Limagne plain are ideal for finding your aero position and rhythm. Use them to settle, not to spend.

Cap effort on the fast opening. Fuel before the climb starts.

Montagne Bourbonnaise, early bike roads

Put a ceiling on the first climbs

The steady climb to La Guillermie averages 3.7% over 9.5 km, the course's defining ascent. Ride it to your planned power, not to the shade the switchbacks offer.

Hold target watts on the climb. Use the switchbacks to settle, not to surge.

Cusset and surrounding hills, middle bike

Keep power below the cost of an early run collapse

A two-part descent from the course's high point leads through Ferrières-sur-Sichon, then technical sections into Arronnes before a long false-flat downhill to Cusset. Stay alert through the technical entries.

Brake early into technical village entries. Use the false flat to recover, not to coast.

Côte Saint-Antoine, 2026 spectator climb

Let the climb cost only what it must

After fast, straight kilometres past Bost and Billezois to Lapalisse's château, the section from La Bruyère to La Croix Rouge is genuinely tougher than its profile suggests: rolling terrain, rougher road surface and very little shade.

Don't underestimate the energy cost here. Keep drinking through the exposed, shadeless stretch.

Bourbonnaise return, final bike stage

Continue eating when the cycling effort accumulates

A familiar, flowing return along the Sichon River brings you back to Vichy. Finish planned nutrition and let cadence rise before the transition.

Finish the planned bottle. Let cadence rise before T2.

Vichy riverfront, opening marathon

Give the legs time to become runners

The flat, fast run around Lac d'Allier and Vichy's parks is a relief after a climbing, rolling bike course. Use the first loop to settle rather than to make up time.

Shorten stride out of T2. Let the opening kilometre feel easy.

Parc des Sources, marathon middle

Use the town's encouragement without changing the effort

Passing the same lake and parks a second time gives a clear read on how loop one's pace is holding after a demanding bike. Adjust deliberately here.

Compare loop two to loop one. Keep fuelling on schedule.

Allier banks, difficult marathon stage

Protect cadence and fuelling when the day becomes long

The third loop is where a hard-ridden climb and rolling terrain start to show up in the legs. Manage effort rather than chasing a pace that's slipping.

Reassess goal pace honestly. Keep taking aid on schedule.

Vichy finish streets, final marathon

Make a late increase only from what remains

The final loop finishes around the same lake and parks. If La Guillermie and the toboggan terrain were paced with restraint, this is where it pays off.

Decide the finish honestly. Save something for the last loop.

What to check in race week

Confirm the 2027 full-distance Allier swim, 180 km Bourbonnaise cycling, transition and entire Vichy marathon. Don't mix the 70.3 course or start procedure with the full race. Check the current Côte Saint-Antoine routing, aid and descents before planning climb targets.

Forecast statusToo early for a forecast

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

Temperature
15.6–29.4°CDew point centred on 13.0°C
Wind and gusts
7.6 km/hGusts up to 32.0 km/hPrevailing direction NW
Rain likelihood
Up to 55%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.

Make your finish prediction and I can send this plan to you in race week.

Build the legs.
Practise the decisions.

A finish range gives you something to work towards. The preparation is specific to this race: long-course fuelling and a conservative hill ceiling are practised until the first hour of the Allier marathon can be genuinely controlled.

I’m Tom. With Sense Endurance Coaching, I’ll build that preparation around your life, follow how you respond and adjust the work as you get closer to Vichy.

Explore coaching
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Course sourceOfficial course

PhotographyRomainbeharCC0 1.0 · resized, cropped and monochrome