The 2027 date is not announced yet. The 2026 edition was scheduled for 10 and 11 October: XXL and L on the Saturday, M on Sunday 11 October at 10 am.

What is the Bayman M distance?

A 1.5 km sea-water swim, a 40 km bike (258 m of climbing) and a 10 km run with the climb up Mont-Saint-Michel at km 8. The time limit is 4 hours.

Do you need a licence for Bayman?

No. Without an FFTri licence you buy a competition pass when you register (€20 for the M in 2026) and fill in a health form. You must be 18 to race solo, 16 for the M relay.

Triathlon du Mont-Saint-Michel: 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 du Mont-Saint-Michel 2027: date, course and training plan

51.5 km · swim 1.5 · bike 40 · run 10Le Mont-Saint-Michel2027 edition: date not announced yet

The Mont-Saint-Michel triathlon is called the Bayman. Everything starts from the Mont-Saint-Michel dam: you swim in sea water in the Couesnon, ride between Brittany and Normandy, and the run climbs through the Mont up to the abbey. It is an end-of-season race: the 2026 edition, the 5th, was scheduled for 10 and 11 October, with a cap of 2,026 athletes over the weekend. The 2027 date is not announced yet.

Your plan for Triathlon du Mont-Saint-Michel

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

Your level?

14-day trial, cancel anytime.

Triathlon du Mont-Saint-Michel at a glance

Date: 2027 edition: date not announced yet2026 edition: 11 October 2026
Formats: Triathlon MPlan below — 1.5 km swim in one loop, in sea water, 40 km bike in one loop (258 m of climbing), 10 km run in one lap with the climb up the Mont at km 8. In 2026: Sunday 11 October at 10 am, 4-hour time limit. Minimum age 18.
Triathlon M relais — The M as a relay team, minimum age 16.
Triathlon L — 1.9 km swim, 90 km bike in one loop (774 m of climbing, aid stations at km 37 and 64), 21 km run in two laps, with the climb up the Mont on the first lap. In 2026: Saturday at 10:15 am, 8 h 30 time limit.
Triathlon XXL — 3.8 km swim in two loops, 180 km bike (two 45 km loops then one of 90 km, 1,535 m of climbing), a four-lap marathon, with the climb up the Mont on the first. In 2026: Saturday at 7:45 am, 15-hour time limit, 400 places.
Registration: Online registration from the official website, with three packs per distance. 2026 prices for the M (Engagé pack): €90 until 1 April for the first 150 entrants, €100 until 1 June for the first 300, then €110; the Finisher pack, with a T-shirt, cost €102 to €122. Without an FFTri licence, a competition pass is compulsory (€20 for the M in 2026) along with a health form, but no medical certificate. Cancellation cover costs €10 on the M. 2026 entries are full; the 2027 opening date is not announced.
Official website: bayman.fr

The 2026 course

Swim: one 1.5 km loop in sea water, starting from the Mont-Saint-Michel dam. Bike: one 40 km loop on fast roads between Brittany and Normandy, 258 m of climbing, with views of the Mont. Run: one 10 km lap along the towpath towards Beauvoir, to the foot of Mont-Saint-Michel, up to the abbey at km 8 and back to finish on the dam, facing the Mont.

What the race asks of your training

The climb up the Mont at km 8

The run follows the towpath towards Beauvoir, reaches the foot of the Mont and climbs up to the abbey at km 8, before the finish on the dam. Short, steep hills at the end of runs, and a few bike-to-run bricks that include a climb, prepare your legs for this late effort.

Swimming in sea water

The swim is near the dam, out and back in the Couesnon, in sea water: the basin is refreshed by the tides each time the dam opens. Swimming in open water a few times, in the sea if you can, gets you used to salt water, sighting and mass starts.

A fast bike course

40 km in one loop and 258 m of climbing: the course is fast, with a few bumps. Threshold-pace blocks and an aero position you can hold for a long time are what save time here.

An October race

Bayman is raced in mid-October, when most of the triathlon season is over. You need to keep up volume through the summer and peak late. On the run there is an aid station every 2 km (water, sports drink, gels and bars, fruit, savoury food): test in training what you will take.

The plan below prepares the Triathlon M format, for an athlete at intermediate level with 5 days available per week. Until the official date is out, the example is set for October 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 du Mont-Saint-Michel