Nice hosted the IRONMAN 70.3 World Championship in 2019, and the course shows why. You swim in the Mediterranean, climb from the coast into the hills behind the city, and finish with two laps on the Promenade des Anglais. IRONMAN calls the bike hilly and the run flat, and that split decides how you should train.
The race also has cut-offs that matter for more athletes than you might expect, including one halfway up the bike course. This page turns the facts into training decisions.
TL;DR: Train the climb. The bike is one loop of 90 km with the Col de Vence at its heart, and you have to reach it at km 36 before 10:55. Ride it on ROUVY, which offers the real course, if you cannot ride in the hills. Practise sea swimming, and some swims without a wetsuit, since the water was 21 to 26 °C in recent years. Pace the bike so you can still run two flat laps in the heat on the Promenade.
What makes Nice different?
- The bike is the race. The 90 km loop leaves the coast for the hills and climbs to the Col de Vence before coming back down to Nice. It is the part of the day where you can gain or lose the most, and where riding too hard costs you on the run.
- The run is flat and hot. Two loops of 10.5 km on the Promenade des Anglais, with aid every 1.8 km. Air temperatures reached 25 to 27 °C in the last three editions.
- The swim is in the sea. One loop of 1.9 km from Plage des Ponchettes. Salt water, swell and sighting without lane lines.
When should you start training?
The race is on 12 September 2027. For most age-groupers a build of 20 to 24 weeks works well.
- Until March: base in all three sports. Swim technique, aerobic riding, easy running and strength work.
- From April: the specific build. Longer rides with climbing, bricks where you run straight off the bike, and open-water swims once the water allows.
- The last two to three weeks: taper. Volume drops, intensity stays.
How do you train for the Col de Vence?
- Ride climbs of 20 to 40 minutes at race effort. The skill is holding a steady power or heart rate on a long climb, not winning a short one.
- Use ROUVY if you live somewhere flat. IRONMAN points to ROUVY, which offers the real Nice bike course. Riding it indoors lets you practise the climb at the right effort, more than once. Coachbox connects with ROUVY, so the workouts your coach plans arrive on your ROUVY account.
- Practise the descent. What goes up comes down toward Nice. Confidence on technical descents saves time and energy, and it is easier to learn in training than on race day.
The cut-offs, and why they matter on the bike
| Point | Cut-off |
|---|---|
| Swim | 1 hour 10 minutes |
| Swim and T1 | 1 hour 20 minutes |
| Col de Vence, bike km 36 | before 10:55 |
| Bike km 90 | before 12:50 |
| Swim, T1 and bike | 5 hours 40 minutes |
| Finish | 8 hours 30 minutes |
The intermediate cut-off on the Col de Vence is the one to plan for if you are a slower swimmer or a newer cyclist. If the climb is not done by 10:55, your race ends there. Know your likely swim time, and train the first 36 km so that you reach the col with margin.
How do you pace the run?
Off the bike, your legs are the problem, not the course. The run is flat, so the danger is starting too fast and paying for it in the heat on the second loop.
- Run the first loop easier than you think. The second loop is where races are won.
- Use the aid stations. There is one every 1.8 km. Drink and cool down at every one in the heat.
- Practise bricks in the build, so running off the bike feels familiar.
How does a coach help for a race like Nice?
A triathlon plan has three sports to balance, and Nice adds a climb, a sea swim and heat. A coach adjusts the plan on the way: the week your swim stalls, the long ride you cannot do because of weather, the bike pacing that turns out too ambitious. A coach also helps with the decisions on this page: how hard to ride the Col de Vence, how much margin you need on the cut-off, and how to run two laps in the heat.
On Coachbox you can tell us exactly that. Choose “Help me find a coach” when you sign up, give IRONMAN 70.3 Nice as your goal, and we introduce you to a coach who fits.
Every fact on this page has a source
Dates, distances, cut-offs and the weather history come from IRONMAN’s own race pages, linked in the facts at the top. We checked them on the date shown there. IRONMAN notes that maps can change closer to the race; if you spot something that no longer holds, let us know and we will update it.