When is the 2026 IRONMAN 70.3 World Championship?

12 and 13 September 2026 in Nice, France. It runs as a two-day event with separate men's and women's races, and IRONMAN allocates an equal but separate number of qualifying slots to each.

How hard is the Nice 70.3 World Championship bike course?

It is one lap that climbs away from the coast into the Alpes-Maritimes over the Col de Vence, then descends back to the seafront. IRONMAN publishes no elevation total for it, and we will not print one: third-party figures for a Nice 70.3 bike range from 1,189 m to 1,367 m, and none of them confirms it is describing the same route the World Championship uses. What is certain is that this is a climbing course followed by a flat run, which is the combination that punishes an over-ridden bike hardest.

Will the swim in Nice be wetsuit legal?

IRONMAN's course page lists an average water temperature of 16 °C, which is comfortably below the 24.5 °C age-group limit and below the 21.9 °C professional limit too, so on that figure a wetsuit is legal for everyone. Treat it with some caution: 16 °C looks low for the Mediterranean in September. The decision is made on race morning from an official reading, so pack for both.

What nutrition is on course at Nice?

From the 2026 athlete guide: bike aid stations carry Precision 1000 electrolyte drink, water, cola, bananas, oranges, Maurten GEL 100 and GEL CAF 100, and Maurten SOLID 160 and SOLID C 160. Run stations carry all of that plus carbonated water, watermelon and salty crackers. There are also fluid stations in both transitions. If you plan to race on course nutrition, train on those exact products first.

What time do I need to qualify for the 70.3 World Championship?

There is no fixed qualifying time. Slots go to the age-group winner automatically, and the rest are allocated by age-graded ranking within a performance pool, so the cut depends on who else raced. The 70.3 Standard used for age grading is referenced to men 18-24 and women 25-29, which differs from the Kona Standard - using the wrong one gives you a wrong number.

How should I pace the Nice course?

Backwards from the run. The Promenade des Anglais is flat and fast, which means there is no terrain to blame a slow run on, and the most common Nice mistake is treating the descent off the Col de Vence as recovery and arriving at a flat seafront half-marathon with nothing left. Set the run pace you intend to hold, then ride the climb at the effort that protects it.

Race guide

70.3 World Championship, Nice 2026

12–13 September, run as two separate races with an equal but separate number of slots for men and women. A one-lap bike climbing into the Alpes-Maritimes over the Col de Vence, then a flat two-loop run on the Promenade des Anglais — a course that splits the field on the climb and gives it nowhere to hide on the run.

The one thing that decides this race

Nice pairs the hardest bike course in the 70.3 championship rotation with one of the flattest runs. That combination is unusual, and it is why the race is won and lost in the last 40 minutes of the bike rather than on the climb itself.

On a hilly course with a hilly run, a rider who overcooks the climb gets a warning: the first hill on the run tells them immediately. In Nice there is no warning. The descent feels like recovery, the seafront looks fast, and the damage does not surface until somewhere around 8 km of a half-marathon on which nothing in the terrain will disguise it.

So plan in this order. Decide the half-marathon pace you can genuinely hold off the bike. Work out the bike effort that leaves it intact. Ride the Col de Vence at that effort even when people are riding away from you, because a great many of them will come back on the Promenade.

Published conditions

Air and water temperatures are the figures IRONMAN publishes on its own course page. They are averages, not a forecast for race weekend.

Published conditions
	Published	What it means for you
Air temperature	18–26 °C	Warm rather than hot. The run is exposed seafront with little shade, so it will feel hotter than the number suggests.
Water temperature	16 °C	Wetsuit legal for everyone. Treat the figure with care — 16 °C looks low for the September Mediterranean.
Swim	Ocean (Baie des Anges, from Plage des Ponchettes)	A pebble-beach start from the Plage des Ponchettes. No current is claimed by any source we accept.
Bike elevation	Not published	IRONMAN publishes no total. Third-party figures span 1,189–1,367 m without confirming they describe the championship route, so we print none.
Run profile	Flat, two loops	Promenade des Anglais. Fast, exposed, and completely honest about a bike ridden too hard.

Conditions from the official IRONMAN course page, retrieved 29 August 2026. The wetsuit ruling applies section 4.02 of the 2026 Competition Rules to the published average.

What is on the aid stations

Taken from the 2026 athlete guide rather than from last year's.

Bike: Precision 1000 electrolyte drink, water, cola, bananas, oranges, Maurten GEL 100 and GEL CAF 100, Maurten SOLID 160 and SOLID C 160.
Run: all of the above, plus carbonated water, watermelon and salty crackers.
Transitions: fluid stations at both swim-to-bike and bike-to-run.

Two practical notes. Precision's PH 1000 is served pre-mixed at 1,000 mg of sodium per litre, so a full 500 ml bottle is roughly 500 mg — you can plan sodium from it precisely, which is unusual on course. And Maurten GEL 160 is a full-distance-only product, so do not plan around finding it here.

If you intend to race on course nutrition, train on these exact products before you travel. A championship race is the worst possible place to discover that a gel does not agree with you.

Setting a realistic target

Do not use general 70.3 benchmarks here without adjusting them. The median 70.3 finish across 1,364,401 finishes is 5:52:23, but that figure is dominated by flat and rolling courses, and this field is a qualified one.

Two adjustments pull in opposite directions. The course is slower than a typical 70.3, because the bike climbs and the swim carries no current. The field is much faster than a typical 70.3, because everyone here qualified. Your own percentile against the general population will therefore look better than your placing on the day.

The useful comparison is your own recent 70.3 time, adjusted for the climb, not a field median. Use the course adjustment calculator with a hilly bike and a flat run to get a defensible number.

Adjust my splits for Nice

Frequently asked questions

When is the 2026 IRONMAN 70.3 World Championship?: 12 and 13 September 2026 in Nice, France. It runs as a two-day event with separate men's and women's races, and IRONMAN allocates an equal but separate number of qualifying slots to each.
How hard is the Nice 70.3 World Championship bike course?: It is one lap that climbs away from the coast into the Alpes-Maritimes over the Col de Vence, then descends back to the seafront. IRONMAN publishes no elevation total for it, and we will not print one: third-party figures for a Nice 70.3 bike range from 1,189 m to 1,367 m, and none of them confirms it is describing the same route the World Championship uses. What is certain is that this is a climbing course followed by a flat run, which is the combination that punishes an over-ridden bike hardest.
Will the swim in Nice be wetsuit legal?: IRONMAN's course page lists an average water temperature of 16 °C, which is comfortably below the 24.5 °C age-group limit and below the 21.9 °C professional limit too, so on that figure a wetsuit is legal for everyone. Treat it with some caution: 16 °C looks low for the Mediterranean in September. The decision is made on race morning from an official reading, so pack for both.
What nutrition is on course at Nice?: From the 2026 athlete guide: bike aid stations carry Precision 1000 electrolyte drink, water, cola, bananas, oranges, Maurten GEL 100 and GEL CAF 100, and Maurten SOLID 160 and SOLID C 160. Run stations carry all of that plus carbonated water, watermelon and salty crackers. There are also fluid stations in both transitions. If you plan to race on course nutrition, train on those exact products first.
What time do I need to qualify for the 70.3 World Championship?: There is no fixed qualifying time. Slots go to the age-group winner automatically, and the rest are allocated by age-graded ranking within a performance pool, so the cut depends on who else raced. The 70.3 Standard used for age grading is referenced to men 18-24 and women 25-29, which differs from the Kona Standard - using the wrong one gives you a wrong number.
How should I pace the Nice course?: Backwards from the run. The Promenade des Anglais is flat and fast, which means there is no terrain to blame a slow run on, and the most common Nice mistake is treating the descent off the Col de Vence as recovery and arriving at a flat seafront half-marathon with nothing left. Set the run pace you intend to hold, then ride the climb at the effort that protects it.

Sources

Everything specific on this page comes from IRONMAN's own course page, the 2026 athlete guide, the 2026 Competition Rules and the qualification pages. Where IRONMAN publishes nothing, we say so rather than filling the gap.

[1]IRONMAN 70.3 World Championship Nice: courseOfficial
IRONMAN · ironman.com · data year 2026 · retrieved 2026-08-29
Source for the swim location, the one-lap bike over the Col de Vence, the two-loop Promenade run, and the published air and water temperatures.
[2]2026 IRONMAN 70.3 World Championship Nice Athlete GuideOfficial
IRONMAN · ironman.com · data year 2026 · retrieved 2026-08-29
Source for the aid-station product lists on this page.
[3]2026 IRONMAN Competition Rules, section 4.02Official
IRONMAN · ironman.com · data year 2026 · retrieved 2026-08-29
The wetsuit temperature thresholds applied on this page.
[4]IRONMAN Age Group QualificationOfficial
IRONMAN · ironman.com · data year 2026 · retrieved 2026-08-29
Confirms the 70.3 World Championship runs as a two-day event with an equal but separate number of slots for men and women.

All outbound links here are marked nofollow. They are references so you can check our figures, not endorsements. Where a source is labelled Secondary it states a number without saying where it came from, and we have flagged it rather than presenting it as established.

Plan the race

Course Adjustment Calculator

Model a hilly bike into a flat run.

Age-Grading Calculator

Rank a time on the 70.3 Standard, not the Kona one.

Nutrition Products

Label data for every product on those aid stations.

Wetsuit Rules

What the race-morning reading actually decides.

Guides that explain this calculator

Sub-6 70.3 Triathlon Splits: Half Ironman Time Calculator Examples

See realistic sub-6 70.3 and Half Ironman split examples, including swim, bike, run, transitions, and bike-run tradeoffs.

Ironman Bike Pacing Strategy: How Many Watts Should You Actually Ride?

What intensity factor to ride for an Ironman or 70.3, why overbiking costs more run time than it saves on the bike, and how to pace without a power meter.

Triathlon Transition Strategy: How T1 and T2 Change Your Finish Time

A practical guide to T1 and T2 planning, transition time estimates, gear setup, and common mistakes that cost free speed.

The Science of Triathlon Pacing: Swim, Bike, Run, and Transition Strategy

A practical guide to triathlon pacing physiology — energy systems, fatigue, cardiac drift, and turning calculator splits into race-day execution.

Trust and methodology

How this page should be used

Model last reviewed

August 8, 2026

Maintained by

M Imtinan Farooq

Age-group triathlete and data engineer

Status

Planning estimate, not a race guarantee

Formula summary

Finish time = 1.9 km swim + T1 + 90 km bike + T2 + 21.1 km run, from entered paces.

Key assumptions

Run pace is a half-marathon pace held off the bike, not a standalone one.

Limitations

Run durability and fuelling decide half-distance outcomes more than swim or bike speed.

Sources

Full formulas, constants, and limitation notes are published on the methodology page. Use the official athlete guide for your own race when it comes to rules, cut-off times, venue policies, and safety instructions - those override anything here.