When is IRONMAN 70.3 Nice 2027?

On Sunday 12 September 2027, according to ironman.com, the same day as IRONMAN France. The race leaves late June, where it was held until 2026 (28 June in 2026).

Are there places left for IRONMAN 70.3 Nice 2027?

Not through standard entry: as of 17 October 2026, individual and relay entries are sold out on ironman.com. Only the IRONMAN Foundation charity entry and Xclusive Challenge packages still guarantee a bib.

Is the 2027 70.3 World Championship in Nice?

No. Nice hosted the 70.3 World Championship on 12 and 13 September 2026. The 2027 edition is in Chattanooga, in the United States, on 28 and 29 August 2027.

How does it differ from IRONMAN France?

IRONMAN France is the full distance (3.8 km swim, 180 km bike, 42.2 km run), raced in Nice on the same day. The 70.3 is half of it: 1.9 km, 90 km and 21.1 km.

Ironman 70.3 Nice: how many weeks of preparation?

For an athlete at intermediate level, Endu builds a 21-week preparation. If your race is closer, the plan compresses phases while keeping the taper; if it's further away, it lengthens the preparation, and when the gap is large the preparation starts right away, gently and at your current volume, before building up.

How many sessions per week?

This example has 6 sessions per week. You choose 5 to 7 training days and the exact days (e.g. Tue, Thu, Sat, Sun): the plan sticks to them.

I'm a beginner, is this plan for me?

The plan adapts to your declared level (beginner to semi-pro): starting volume, progression and intensity change. Endu also offers a "Discovery" mode without a race to build a base first.

Can I follow sessions on my watch?

Yes, on Garmin and COROS. On Garmin, the Endu app (Connect IQ Store) shows today’s session and starts it as a guided workout. On COROS, link your account from your profile: your running, trail and cycling sessions land in the watch calendar. Other brands are not supported yet.

How much does it cost?

14-day free trial, then €7.99/month with no commitment or €59.88/year (€4.99/month). Unlimited objectives and sports.

Ironman 70.3 Nice 2027: date, course and training plan

113 km · swim 1.9 · bike 90 · run 21.1Nice2027 edition: 12 September 2027

IRONMAN 70.3 Nice starts at Ponchettes beach for a Mediterranean swim, climbs into the hinterland over the Col de Vence, then finishes with two flat laps on the Promenade des Anglais. Held in late June until 2026, it moves to Sunday 12 September in 2027, the same day as IRONMAN France, the full distance.

Your plan for Ironman 70.3 Nice

45 weeks to go: your plan starts this week, set to your level and free days, then adapts to your feedback after each session.

Your level?

14-day trial, cancel anytime.

Ironman 70.3 Nice at a glance

Date: 2027 edition: 12 September 2027
Formats: IRONMAN 70.3Plan below — 1.9 km swim in one loop, 90 km bike over the Col de Vence (about 1,230 m of climbing on the 2026 map), 21.1 km run in two laps. Rolling start. Swim within 1 h 10, Col de Vence (km 36) by 10:55 am, off the bike by 12:50 pm, finish within 8 h 30.
Relais — Teams of two or three, with the same cut-offs.
Registration: Sold out for 2027: individual and relay entries are sold out on ironman.com. Only the IRONMAN Foundation charity entry ($1,108) and Xclusive Challenge packages still guarantee a bib. Among other half IRONMAN races in France in 2027, ironman.com suggests Aix-en-Provence on 23 May and Vichy on 22 August. Not to be confused with the 70.3 World Championship on 12 and 13 September 2026 in Nice, for qualified athletes only.
Official website: ironman.com/races/im703-nice

The 2026 course

The swim, one 1.9 km loop, starts from Ponchettes beach, in front of Quai des États-Unis; transition is on the Promenade des Anglais. The bike, a single loop, heads west to Saint-Laurent-du-Var, climbs via La Gaude, Saint-Jeannet and Vence to the Col de Vence (km 36), passes about 1,000 m of altitude near Coursegoules, then descends via Bézaudun-les-Alpes, Le Broc and Carros before returning to Nice along the Var valley: about 1,230 m of climbing according to the 2026 map. The half marathon is two flat laps on the Promenade des Anglais, starting by the Casino Ruhl, with an aid station every 1.8 km.

What the race asks of your training

The Col de Vence

The bike starts at sea level and climbs to about 1,000 m of altitude, with a mandatory checkpoint at the Col de Vence by 10:55 am. You need to climb for a long time at a steady pace: long mountain rides and threshold hill sessions. The sample plan below is for a classic half: remember to add this climbing.

Sometimes a non-wetsuit swim

Wetsuits are banned above 24.5 °C. IRONMAN measured 21 °C in 2024, 26 °C in 2025 and 23 °C in 2026, when the race was held in late June; in 2027 it moves to September. Training to swim without a wetsuit, in open water, avoids a nasty surprise on race morning.

Running flat after the mountains

After a very hilly ride, the half marathon is completely flat. Bricks of hilly riding followed by a steady run teach you to find your legs after the descent.

A build-up through the summer

With the race on 12 September, the biggest weeks fall in July and August, often in the heat. Riding early in the morning for long mountain rides, and keeping one warmer session a week to get used to it, helps you hold the volume without wearing yourself out.

The plan below prepares the IRONMAN 70.3 format, for an athlete at intermediate level with 6 days available per week, with race day on 12 September 2027. Aiming for another format? Enter its distance when you create your plan, which will be calibrated on your level, your available days and your feedback after every session.

weeks: 21
sessions: 125
sessions / week: 6
peak week: 10.3 h

Plan structure

Periodised in phases: build the base, move to race-specific work, then taper before the race.

General preparation
Weeks 1–2 · 2 wk
Base
Weeks 3–8 · 6 wk
Build
Weeks 9–13 · 5 wk
Specific
Weeks 14–18 · 5 wk
Taper
Weeks 19–20 · 2 wk
Race week
Weeks 21–21 · 1 wk

Volume progression

Week by week: lighter recovery weeks are built in to absorb the load.

Wk	Phase	Hours	km
1	General preparation	6.3 h	21
2	General preparation	6.6 h	22
3	Baserecovery	5.6 h	19
4	Base	7.2 h	23
5	Base	7.5 h	24
6	Base	7.7 h	25
7	Baserecovery	6.1 h	20
8	Base	8.1 h	25
9	Build	8.5 h	28
10	Build	8.7 h	28
11	Buildrecovery	6.7 h	24
12	Build	9 h	29
13	Build	9.2 h	30
14	Specific	9.5 h	30
15	Specificrecovery	7.2 h	24
16	Specific	9.6 h	30
17	Specific	10 h	32
18	Specific	10.3 h	33
19	Taper	7 h	22
20	Taper	5.7 h	18
21	Race week	3.6 h	8

Sample week — week 12 (Build)

Real sessions from the plan with their targets. Each session is detailed step by step, and can be sent to a Garmin or COROS watch.

MondaySwimmingEasy
59 min continuous swim
59 min · 2.7 km
TuesdayRunningVery hard
3 × 1.2 km at MAS
2 min 30 s jog recovery
48 min · 8.8 km
ThursdayBrickHard
1 h 30 bike + 17 min run
including 3 × 10 min at threshold on the bike · run at marathon pace
1 h 55
FridaySwimmingHard
10 × 200 m at threshold
20 s recovery
59 min · 2.8 km
SaturdayCyclingEasy
2 h 45 at endurance pace
2 h 45
SundayRunningEasy
Long run 1 h 33
1 h 33 · 15 km

Example generated for a intermediate-level profile (MAS 15 km/h, 6 days available per week). Your plan will depend on your level, availability and feedback.

This plan’s check-up

Pass

A 21-week build (recommended minimum: 12); a longest run never more than 6% above the previous month’s; volume rising at most 13% from one week to the next; 82% of the time at easy effort; the longest session 3 weeks before the race; a taper cutting volume by 65% in race week.

2 worth knowing · 22 checks passed

Remarks

Strength training — No strength session.
Fueling — Long sessions (up to 195 min in this plan) are where race fueling is rehearsed.

The 22 checks passed, in detail

Length of the build — 21 weeks: enough for this race (recommended minimum: 12).
Sessions per week — 6 sessions a week: the minimum for this race is met.
Volume progression — Running volume rises at most 13% from one week to the next (a signal appears beyond 20%).
Long run increase — Each week, the longest run is at most 6% longer than the longest of the previous month (benchmark: 10%).
Lighter weeks — A lighter week comes back regularly (weeks 3, 7, 11, 15, 19).
Intensity distribution — About 82% of the time at easy effort: the most common distribution among trained endurance athletes.
Demanding sessions — No more than 3 demanding session(s) a week: suited to the level.
Hard days back to back — Demanding sessions are separated by easy days.
Rest days — At least one rest day a week.
Timing of the longest session — The longest session falls 3 weeks before the race: the right time.
Bike-run bricks — 10 bike-run bricks over the last 12 weeks.
Taper — Volume drops 65% in race week.
Intensity during the taper — Short race-pace efforts remain in the last two weeks.
Frequency during the taper — The number of sessions stays close to usual (92%).
Swim / bike / run balance — Swim 22%, bike 48%, run 30%: within coaches’ benchmarks.
Frequency per discipline — Each discipline comes back at least 2 times a week.
Sessions per week — 6 sessions a week: enough for a long format.
Open water — 5 open-water session(s) before the race.
Longest ride — The longest ride lasts 195 min (benchmark: 180 to 270 min).
Longest run — The longest run lasts 110 min (benchmark: 90 to 135 min).
Swim distance — The longest swim covers 174% of the race distance.
Long ride increase — The long ride grows in small steps.

Endu runs its own plans through the plan check open to everyone: same public rules, same thresholds, same sources. The rules and their sources, and a check of your own plan.

Why this plan works

Science-based periodisation

Base → build → specific → taper, with a recovery week every 3 to 4 weeks. Load goes up, but never two hard weeks in a row without a breather.

Paces, not vague feelings

Every session has target zones (pace, HR) computed from your MAS or a reference performance. A MAS test is built into the plan if you don't know yours.

Three disciplines, one load

Swim, bike and run are planned together: brick sessions, key sessions spread out, and a coherent total load week after week.

A plan that listens

After each session you rate how it felt (RPE). Too hard? The plan eases what follows. Skipped a session? It reschedules or absorbs it.

On your watch

On Garmin with the Endu app, on COROS by direct sync: the guided workout shows up on your wrist, step by step.

Reviews

What our users say.

4.8/5

“For triathlon, having all three sports in the same schedule really makes my life easier. I spend less time organising my training and I still enjoy following it just as much.”
Maxime · Triathlon
“At first I just wanted to try it. Now checking the next day’s session has become my little evening ritual 😊”
Sarah · Triathlon
“I used to spend more time looking for a plan than following one. Now I have my sessions, I know what to do and I stick to it. Really glad I tried it.”
Thomas · Running
“Training for my first half marathon and honestly, I’m getting into it! I even look at my next sessions ahead of time, when before I was mostly looking for an excuse not to go out 😂”
Camille · Running
“Simple to follow and really handy with the watch. I start my session and off I go.”
Julien · Running
“I took Endu to prepare a trail race with friends. I really like having my week already organised: it motivates me and I enjoy my runs more.”
Émilie · Trail
“What I like is no longer asking myself a thousand questions before going for a run. I follow the plan and I enjoy training.”
Nicolas · Trail
“With work and the kids, I thought I’d struggle to follow a plan. In the end, having a structure helps me a lot. Running has found a real place in my week again, and it feels good!”
Julie · Trail
“A good find to prepare my swimrun! It’s nice to find a plan for this sport. I’ve recommended it to my teammate.”
Antoine · Swimrun
“I run more regularly and, above all, with more desire. For that alone, I’m delighted.”
Laura · Swimrun

Your plan, not a template athlete's

This plan is generated for an athlete at intermediate level with 6 days available per week. Yours will be calibrated on your MAS, your available days and your feedback after every session. 3 minutes. 14-day trial, cancel anytime.

Create my plan for Ironman 70.3 Nice