The Vichy Bike Course: 180 Rolling Kilometers You Win (or Lose) with Your Head

The numbers, with an honest caveat

The bike leg of the Vichy full distance measures 180.2 km with 2,110 m of elevation gain as stated by the organizer. But watch out: several race reports mention 2,300-2,400 m actually measured on the day. That's not a small difference. Plan your pacing as if the real meters are the ones from the reports, not the brochure. If the day goes well, you'll have margin. If the reports are right, you won't get any surprises.

The course layout

The design is easy to memorize: about 15 flat, fast kilometers to Saint-Yorre, then a big 70-72 km loop starting from Cusset that you ride twice. The terrain alternates long flowing straights with rolling, technical sections, and the area near Lapalisse is described as a "toboggan": constant up and down that breaks your rhythm and tempts you to push too hard.

There are three key climbs:

• La Guillermie: 9.5 km at 3.7% average, the highest point on the course.
• Toward Saint-Nicolas des Biefs: roughly 16 km at 3% average. Long, never nasty, draining.
• Châtel-Montagne: a steady climb, shorter but one to respect.

None of these is a wall. They're steady-watts climbs, not explosive efforts. The risk isn't blowing up on the climb: it's coming off it with too many joules burned and paying for them in the marathon.

The technical sections to know beforehand

Four spots deserve a mental note (or a recon ride if you arrive a few days early):

• The descent toward Les Corres: technical, demands confident hands and clean lines.
• Rough asphalt between km 124 and km 132: vibrations, watch bottles and anything poorly secured.
• The first 2.5 km along the lake: slippery when wet. If it rains, start cautiously.
• The chicane at Puy-Guillaume: brake before it, not in it.

Concrete action: fit reliable tires with good grip, check your pressure for the rough asphalt, and do at least one long ride with technical descents in a fatigued state.

Pacing: don't burn yourself in the first 90 km

The first section is fast and fun. It's also a trap. The bulk of the climbing and the heat come later, and in late August this region can go well past the comfort threshold: in 2023 the day ended at 35-38 °C during the marathon. Stay below threshold on the long climbs. On La Guillermie and the 16 km stretch at 3%, your goal is a flat, sustainable wattage, not passing the small group ahead. Train long race-pace blocks on gentle climbs: that's exactly what this course demands.

Gearing and equipment

With average gradients of 3-4%, you don't need pure climber gearing, but you do need to pedal smoothly on the second lap, with 140 km in your legs. If you're torn between two cassettes, pick the easier one. The rough asphalt section and the technical descents reward a position you can hold for a long time and a bike you know well.

Aid stations and cut-offs

On the bike you'll find 8 aid stations with pre-mixed bottles of PH 1000 and Maurten nutrition. If you use other products, you have to carry them yourself: plan for it in advance. On timing, the available data indicates swim+bike must be completed by 11:00 a.m., but the exact interpretation of this cut-off should be verified on the official website: do it before you travel, especially if your goal is a finish under 16 hours.

What to do now

Three actions: 1) schedule 60-90 minute race-pace blocks on gentle climbs; 2) test tires and pressures on beat-up asphalt; 3) decide now whether you'll go with the official nutrition or your own, and train with it. You don't win the Vichy bike leg: you manage it. The marathon will tell you whether you managed it well.