AI synthesis with sources · 3 min · edition 2027
The Vichy 70.3 Bike Course: Rolling, Not Brutal, But You Need to Ride It Smart
89.8 km with 884 m of climbing, one long steady climb up to La Guillermie and a final descent that demands focus: how to nail your pacing and your lines.
The Big Picture
The bike leg measures 89.8 km. The official course page lists 884 m of elevation gain; one technical source (Ekoi) puts it at around 1,000 m. Either way, this is a rolling course, not a mountainous one: you ride between the Limagne plain and the Livradois-Forez park, on the same loop as the full-distance race, with a detour toward Vichy instead of the second big lap.
In practical terms: you don't need climbing gearing, you need a pacing plan and clean bike handling. Out here, minutes are won or lost more with your lines than with your watts.
The First 2.5 km: That's Not Where You Win
The first 2.5 km run along the lake, and several race reports flag them as slippery in the wet. After a swim in 22-25 °C water you'll come out feeling good and tempted to push right away. Resist. Settle into a rhythm, take a sip, get your feet into your shoes and wait for the road to open up. The race is decided much later.
La Guillermie: 9.5 km at 3.7%
The key climb goes up to La Guillermie, the highest point on the course: 9.5 km at an average gradient of 3.7%. It's a steady, rideable climb, the kind that punishes anyone who treats it like a series of surges. The right approach is a measured, consistent effort, slightly below the threshold you'd hold on flat terrain. If you ride with a power meter, set a ceiling and stick to it; if you're going by feel, you should be able to speak in short sentences all the way up.
How to prepare for it: build long, steady climbs at race effort into your training, 20-40 minutes continuous, not short repeats. It's a different kind of work and you'll feel the difference.
Technical Sections: Chicane, Road Surface and the Final Descent
Three spots flagged in race reports deserve attention:
- Chicane at Puy-Guillaume: brake before the corner, not in it.
- Sections of rough asphalt: keep a firm grip and make sure your bottle is secured; some finishers report uneven surfaces in several spots.
- The finish: after the last aid station there's a short kicker of about 40 m of elevation, then a descent on Route de Creuzier to take carefully before transition. This is not the place to claw back 30 seconds: arrive in T2 sharp and in one piece.
Overall Pacing and Nutrition
The rolling profile tempts you into spiky power output: that's the classic mistake. The goal: power as steady as possible, a touch higher on the climbs, active recovery on the descents. The run is flat and fast, so it rewards whoever gets off the bike with real legs.
On nutrition, race reports converge on a simple scheme: one gel roughly every 35 minutes and one bottle per hour. Bike aid stations stock Maurten gels and solids plus PH 1000 drink in bottles: either test them in training before race day, or carry your own. In the late-August heat (official highs of 25 °C, with possible peaks toward 28 °C) one bottle per hour is a minimum, not a maximum.
What to Do Now
1. Schedule long, steady climbs (20-40 min) at race effort in the final 8 weeks. 2. Set a power or effort ceiling for La Guillermie and rehearse it in training. 3. Test Maurten and PH 1000 on a long ride, or plan around your own products. 4. Work on your bike handling: controlled descents and tight corners, especially if you race deep-section wheels.