When is the 2027 Saint-Jean-de-Monts triathlon?

On Saturday 19 and Sunday 20 June 2027. The S and M are raced on Sunday 20 June; 2027 start times are not set yet (provisionally 10 am for the S and 2:45 pm for the M).

How do you enter the Saint-Jean-de-Monts triathlon?

Online on njuko, from December, via the club website. No entries on the day. In 2026 the M cost €55 solo and was almost full.

Is drafting allowed on the bike?

Yes, drafting is allowed in every race, including the Olympic distance.

Triathlon International Saint-Jean-de-Monts: how many weeks of preparation?

For an athlete at intermediate level, Endu builds a 15-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 5 sessions per week. You choose 4 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.

Triathlon International Saint-Jean-de-Monts 2027: date, course and training plan

50.5 km · swim 1.5 · bike 39 · run 10Saint-Jean-de-Monts2027 edition: 20 June 2027

The Saint-Jean-de-Monts international triathlon, in the Vendée, is run by the Saint Jean de Monts Vendée Triathlon club on the seafront esplanade. Over two days it offers children’s races, XS races, a sprint and an Olympic distance, and drafting is allowed on the bike in every race. The 42nd edition takes place on 19 and 20 June 2027, with the Olympic distance on the Sunday.

Your plan for Triathlon International Saint-Jean-de-Monts

33 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.

Triathlon International Saint-Jean-de-Monts at a glance

Date: 2027 edition: 20 June 2027
Formats: Triathlon MPlan below — 1,500 m swim, 39 km bike, 10 km run, solo or relay. Sunday 20 June 2027; the provisional start time shown is 2:45 pm (2027 times not set).
Triathlon S — 750 m swim, 20 km bike, 5 km run, solo (county adult championship) or relay. Sunday morning, 10 am on the provisional schedule.
Triathlon XS et Tri Relais entreprises — 300 m swim, 12 km bike, 3.6 km run, on Saturday late afternoon. A shorter XS (300 m, 10.5 km, 2.4 km) is reserved for the benjamin and minime youth categories.
Courses enfants — A duathlon for 6 to 7-year-olds and triathlons for 8 to 9 and 10 to 11-year-olds, on Saturday afternoon.
Registration: Online registration on njuko, from the club website, from December. 2027 prices are not set yet; in 2026 the M cost €55 solo and €25 per person as a relay, and only one solo place was left. No entries on the day, closing on Thursday 17 June 2027 at 11:30 pm. Cancellation only with a medical certificate; bib resale is banned and bibs are only handed to the entrant, on proof of identity.
Official website: triathlon-vendee.com/triathlon-international-saint-jean-de-monts

What the race asks of your training

Drafting changes the race

Drafting is allowed on the bike in every race. Your swim exit therefore matters a lot: swimming hard for the first minutes to catch a group saves more time than riding alone. A few group rides teach you to sit on a wheel, take turns and respond to accelerations.

A mid-afternoon start

The provisional M start is 2:45 pm, in late June. Doing a few key sessions at that time of day, testing your lunch and your drink, prepares you to race after half a day of waiting, sometimes in the heat.

Bricks at threshold pace

On a draft-legal Olympic distance the bike is often stop-start and the run decides the result. Bricks with surges on the bike, followed by 20 minutes of running at threshold pace, teach you to run fast on tired legs.

The plan below prepares the Triathlon M format, for an athlete at intermediate level with 5 days available per week, with race day on 20 June 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: 15
sessions: 74
sessions / week: 5
peak week: 7 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 3–6 · 4 wk
Build
Weeks 7–9 · 3 wk
Specific
Weeks 10–12 · 3 wk
Taper
Weeks 13–14 · 2 wk
Race week
Weeks 15–15 · 1 wk

Volume progression

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

Wk	Phase	Hours	km
1	General preparation	4.4 h	17
2	General preparation	4.7 h	18
3	Base	5.3 h	12
4	Base	5.5 h	13
5	Baserecovery	4 h	10
6	Base	5.7 h	13
7	Build	6 h	14
8	Build	6.1 h	15
9	Buildrecovery	4.2 h	11
10	Specific	6.4 h	15
11	Specific	6.8 h	16
12	Specific	7 h	17
13	Taper	5.1 h	18
14	Taper	4.1 h	16
15	Race week	2.4 h	7

Sample week — week 8 (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
39 min continuous swim
39 min · 1.8 km
TuesdayBrickHard
1 h 05 bike + 45 min run
including 3 × 10 min at threshold on the bike · run at threshold
1 h 58
FridaySwimmingHard
3 × 300 m at threshold
40 s recovery
37 min · 1.7 km
SaturdayCyclingEasy
1 h 44 at endurance pace
1 h 44
SundayRunningEasy
Long run 1 h 09
1 h 09 · 11.1 km

Example generated for a intermediate-level profile (MAS 15 km/h, 5 days available per week). Your plan will depend on your level, availability and feedback.

This plan’s check-up

Pass

A 15-week build (recommended minimum: 8); a longest run never more than 8% above the previous month’s; 83% of the time at easy effort; a taper cutting volume by 66% in race week.

3 worth knowing · 19 checks passed

Remarks

Demanding sessions — Up to 4 demanding sessions in a single week (1 week(s)).
Strength training — No strength session.
Fueling — Long sessions (up to 128 min in this plan) are where race fueling is rehearsed.

The 19 checks passed, in detail

Length of the build — 15 weeks: enough for this race (recommended minimum: 8).
Sessions per week — 5 sessions a week: the minimum for this race is met.
Volume progression — Running volume rises smoothly from week to week.
Long run increase — Each week, the longest run is at most 8% longer than the longest of the previous month (benchmark: 10%).
Lighter weeks — A lighter week comes back regularly (weeks 5, 9, 13).
Intensity distribution — About 83% of the time at easy effort: the most common distribution among trained endurance athletes.
Hard days back to back — Demanding sessions are separated by easy days.
Rest days — At least one rest day a week.
Bike-run bricks — 10 bike-run bricks over the last 12 weeks.
Taper — Volume drops 66% 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 (90%).
Swim / bike / run balance — Swim 21%, bike 46%, run 32%: within coaches’ benchmarks.
Frequency per discipline — Each discipline comes back at least 2 times a week.
Open water — 3 open-water session(s) before the race.
Longest ride — The longest ride lasts 120 min (benchmark: 90 to 150 min).
Longest run — The longest run lasts 80 min (benchmark: 60 to 105 min).
Swim distance — The longest swim covers 187% 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 5 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 Triathlon International Saint-Jean-de-Monts