When is IRONMAN 70.3 Les Sables d'Olonne 2027?

It is not held in 2027. IRONMAN describes a planned break as part of an alternating calendar, with a return in 2028, on a date not announced yet. The last edition was raced on Sunday 5 July 2026.

Is there an IRONMAN in Les Sables d'Olonne in 2027?

Yes, the full distance: IRONMAN Les Sables d'Olonne-Vendée, on Sunday 27 June 2027, with a 3.8 km swim, 180 km bike and a marathon. Registration is open on ironman.com.

How much is IRONMAN Les Sables d'Olonne 2027?

€920.64 all in as of 17 October 2026, fees and VAT included. The price rises as places are sold.

Where and when did the 70.3 start?

In 2026, the start was at 7 am from the Grande Plage in Les Sables d'Olonne, with transition on Place du Vendée Globe and the finish on the Remblai.

Ironman 70.3 Les Sables d'Olonne: 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 Les Sables d'Olonne 2028: date, course and training plan

113 km · swim 1.9 · bike 90 · run 21.1Les Sables d'Olonne2028 edition: date not announced yet

IRONMAN 70.3 Les Sables d'Olonne-Vendée has been held since 2019: a swim from the Grande Plage into the Vendée Globe channel, a bike leg through the Olonne forest and marshes, and a half marathon on the Remblai seafront. It now alternates with the full IRONMAN Les Sables d'Olonne-Vendée: the 70.3 was raced on 5 July 2026, takes a planned break in 2027 and returns in 2028. In 2027, it is the full IRONMAN distance that takes place in Les Sables d'Olonne, on Sunday 27 June.

Your plan for Ironman 70.3 Les Sables d'Olonne

A plan set to your level and free days, which adapts to your feedback after each session.

Your level?

14-day trial, cancel anytime.

Ironman 70.3 Les Sables d'Olonne at a glance

Date: 2028 edition: date not announced yet2026 edition: 5 July 2026
Formats: IRONMAN 70.3 Les Sables d'OlonnePlan below — 1.9 km sea swim in one loop, 90 km bike in one loop (600 m of climbing), 21.1 km run in two loops. 2026 cut-offs, counted from each athlete’s own start time: 1h10 for the swim, 5h30 to finish the bike, 8 hours to finish, with km 12 of the run to be reached by 3:05 pm. Relays available. No edition in 2027, back in 2028 (date not announced).
IRONMAN Les Sables d'Olonne-Vendée — The full IRONMAN distance, on Sunday 27 June 2027 (second edition after 2025): 3.8 km swim into the Vendée Globe channel, 180 km rolling bike on closed roads through 17 municipalities, 42.2 km run. Swim cut-off 2h20. €920.64 all in as of 17 October 2026. Qualifying slots for the 2027 IRONMAN World Championship.
Registration: No registration is possible for the 70.3: ironman.com shows “registration closed” and a 2028 date “TBD”. To race in Les Sables d'Olonne in 2027, enter the full IRONMAN on 27 June on ironman.com: €920.64 all in as of 17 October 2026 (€685 entry, €82.20 fees and €153.44 VAT), a price that rises as places sell; IRONMAN says over 80% of places are sold. In France, every athlete needs an annual FFTri licence or a Licence Expérience, free for licence holders from several neighbouring countries (Britain, Germany, Belgium, Switzerland, Spain, Italy…).
Official website: ironman.com/races/im703-les-sables-dolonne

The 2026 course

Start at 7 am from the Grande Plage. Swim: 1.9 km in one loop, from the beach into the Vendée Globe channel, then up a 250 m pontoon to transition on Place du Vendée Globe. Bike: one 90 km loop through the Olonne forest and marshes, across ten coastal towns, 600 m of climbing; aid stations at km 23, 53 and 72. Run: along the harbour to the small pier of the green lighthouse, 200 m on the sand of the Grande Plage, then two loops from the Remblai to the Puits d'Enfer via the Lac de Tanchet, and a straight finish on the Remblai.

What the race asks of your training

A sea swim into the channel

You start from the Grande Plage, in the Atlantic, and finish in the Vendée Globe channel, before climbing a 250 m pontoon to transition. IRONMAN lists an average water temperature of 19 °C: wetsuits will very likely be allowed (up to 24.5 °C) and they are mandatory below 16 °C. A few sea swims before the race teach you to sight and to swim in the swell.

A rolling bike leg, in the coastal wind

600 m of climbing over 90 km, through forest and marshland: little relief, but you pedal non-stop and the coastal wind can weigh on you. Long blocks in the aero position, at a steady pace, prepare you better than hill work. Drafting is banned: 12 m between bikes and 25 seconds to pass.

A two-loop half marathon on the seafront

The half marathon runs along the harbour to the green lighthouse, covers 200 m on the sand of the Grande Plage, then does two loops from the Remblai to the Puits d’Enfer via the Lac de Tanchet, with an aid station about every 2 km. Bricks of bike followed by 20 to 40 minutes at target pace teach you to find your rhythm straight out of transition.

In 2027: a 70.3 elsewhere or the full IRONMAN

If you were aiming for this 70.3 in 2027, you have two options: another half-distance race, or the full IRONMAN in Les Sables on 27 June 2027. The latter calls for a longer, bigger build-up, with 5 to 6-hour rides: the sample plan below prepares a 70.3.

The plan below prepares the IRONMAN 70.3 Les Sables d'Olonne format, for an athlete at intermediate level with 6 days available per week. Until the official date is out, the example is set for July 2028. 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 Les Sables d'Olonne