Courses · IRONMAN · Nice, France
The 2026 course · Powered by blamethecourse.com
170.8 km measured along the road and 2404 m of climbing read off the ground, in 10 climbs.
Predict my bike split Your weight, your watts on each kind of road, road bike or TT bike: the course is already loaded, nothing to upload.
A model, not a measurement. What it can show depends on the numbers above — what you typed, and what your files recorded — and on assumptions this page states; anything it cannot stand behind says so rather than drawing a tidier line.
66% of the IRONMAN France bike course is road where an aero position does most of its work: 113.2 km between −4% and +3%. 17.3 km (10%) climbs at 5% or more, where most riders sit up. What a TT bike is worth to you depends on your watts and how aero you are on each bike, so the page does not guess: ride it both ways in the predictor and compare the two.
| Kind of road | How much | Up |
|---|---|---|
| Steep, above 8% | 4.7 km | 533 m |
| Climbing, 5 to 8% | 12.7 km | 806 m |
| Climbing, 3 to 5% | 15.0 km | 587 m |
| Rising, 1 to 3% | 21.7 km | 422 m |
| Flat, −1 to 1% | 61.7 km | — |
| Descending, −4 to −1% | 29.8 km | — |
| Dropping, below −4% | 25.4 km | — |
The same kinds of road the predictor asks about: there you set the watts you will hold and how you will sit on each.
Each piece named by what the ground is: the climbs, the flats and the descents.
| Piece of road | Length | Slope | Rise |
|---|---|---|---|
| Flat, 9.7 km from km 0.0 | 9.7 km | — | 4 m |
| Climb, 1.4 km at 6.6% from km 9.7 | 1.4 km | 6.6% | 91 m |
| Flat, 3.2 km from km 11.1 | 3.2 km | 1.4% | 45 m |
| Climb, 5.0 km at 3.3% from km 14.3 | 5.0 km | 3.3% | 167 m |
| Flat, 14.2 km from km 19.4 | 14.2 km | 0.6% | 84 m |
| Descent, 6.8 km at 3.0% from km 33.6 | 6.8 km | -3.0% | — |
| Climb, 10.9 km at 5.0% from km 40.4 | 10.9 km | 5.0% | 542 m |
| Flat, 1.5 km from km 51.3 | 1.5 km | — | 6 m |
| Climb, 6.7 km at 5.2% from km 52.9 | 6.7 km | 5.2% | 352 m |
| Flat, 3.4 km from km 59.6 | 3.4 km | — | — |
| Climb, 1.5 km at 3.4% from km 63.0 | 1.5 km | 3.4% | 52 m |
| Descent, 3.0 km at 3.0% from km 64.5 | 3.0 km | -3.0% | — |
| Flat, 1.7 km from km 67.5 | 1.7 km | — | — |
| Climb, 1.9 km at 2.8% from km 69.2 | 1.9 km | 2.8% | 54 m |
| Flat, 4.4 km from km 71.1 | 4.4 km | 0.7% | 29 m |
| Descent, 1.4 km at 2.7% from km 75.5 | 1.4 km | -2.7% | — |
| Climb, 3.2 km at 3.2% from km 76.9 | 3.2 km | 3.2% | 103 m |
| Flat, 5.5 km from km 80.1 | 5.5 km | — | — |
| Descent, 2.8 km at 3.7% from km 85.5 | 2.8 km | -3.7% | — |
| Flat, 10.8 km from km 88.3 | 10.8 km | 0.9% | 103 m |
| Descent, 1.3 km at 3.5% from km 99.1 | 1.3 km | -3.5% | — |
| Flat, 2.4 km from km 100.5 | 2.4 km | — | — |
| Descent, 9.5 km at 5.4% from km 102.8 | 9.5 km | -5.4% | — |
| Climb, 7.9 km at 4.7% from km 112.3 | 7.9 km | 4.7% | 372 m |
| Descent, 1.1 km at 3.3% from km 120.2 | 1.1 km | -3.3% | — |
| Climb, 1.2 km at 4.4% from km 121.3 | 1.2 km | 4.4% | 55 m |
| Flat, 1.5 km from km 122.6 | 1.5 km | 1.1% | 17 m |
| Descent, 5.7 km at 4.4% from km 124.1 | 5.7 km | -4.4% | — |
| Flat, 1.2 km from km 129.8 | 1.2 km | -0.8% | — |
| Descent, 5.9 km at 4.3% from km 130.9 | 5.9 km | -4.3% | — |
| Climb, 1.9 km at 3.0% from km 136.8 | 1.9 km | 3.0% | 58 m |
| Descent, 2.7 km at 3.4% from km 138.8 | 2.7 km | -3.4% | — |
| Flat, 2.3 km from km 141.5 | 2.3 km | -1.4% | — |
| Descent, 3.4 km at 3.6% from km 143.8 | 3.4 km | -3.6% | — |
| Flat, 3.1 km from km 147.2 | 3.1 km | -1.1% | — |
| Descent, 5.7 km at 4.1% from km 150.3 | 5.7 km | -4.1% | — |
| Flat, 14.8 km from km 156.0 | 14.8 km | — | — |
This page describes the road; how long it takes depends on who rides it. Set your weight, the watts you will hold on each kind of road and how you will sit, and the predictor answers with your bike split and the band around it, climb by climb.
How the road was measured
The length is measured along the mapped roads (OpenStreetMap), which all of the route followed, rather than along a GPS trace, which is longer or shorter than the road by however far its receiver wandered. The course file itself said 170.7 km, and a head unit measuring its own trace will read something close to that.
The climbing is read off a terrain model of the ground, averaged along the road, rather than off a barometer, which cannot tell a change in the weather from a hill. A terrain model is the bare ground, so a bridge or an overpass reads as what is under it. The file's own altimeter said 3760 m, near enough the same road.
The course as described from the course IRONMAN published for 2026. watts & time is not connected with the event or its organisers; a course changes from year to year, so check the current one before you plan on it.
170.8 km with 2404 m of climbing (14.1 m per km), in 10 climbs. The distance is measured along the mapped roads (OpenStreetMap) rather than a GPS trace, and the climbing is read off a terrain model of the ground rather than a barometer, which drifts with the weather, so a head unit will often show slightly different figures.
66% of it is road where an aero position does most of its work: 113.2 km between -4% and +3%. 17.3 km (10%) climbs at 5% or more, where most riders sit up. What a TT bike is worth to you depends on your watts and how aero you are on each bike: ride both in the predictor and compare the two.
Climb, 10.9 km at 5.0%, from km 40.4: the most climbing in one go, 542 m. The steepest is Climb, 1.4 km at 6.6%, from km 9.7.
In the order you meet them: Climb, 1.4 km at 6.6% from km 9.7; Climb, 5.0 km at 3.3% from km 14.3; Climb, 10.9 km at 5.0% from km 40.4; Climb, 6.7 km at 5.2% from km 52.9; Climb, 1.5 km at 3.4% from km 63; Climb, 1.9 km at 2.8% from km 69.2; Climb, 3.2 km at 3.2% from km 76.9; Climb, 7.9 km at 4.7% from km 112.3; and 2 more.
That depends on you, so this page does not guess: open the course in the predictor. Set your weight, the watts you will hold on each kind of road and how you will sit, on a road bike or a TT bike, and it answers with your bike split and the band around it, climb by climb. Nothing to upload: the course is already there.