When is the 100 km de Millau 2027?

The 2027 date is not announced yet. The race is held on the last Saturday of September; the 54th edition was run on Saturday 26 September 2026, with an 8 am start for the 100 km, the marathon and the 23 km.

Is there a cut-off on the Millau marathon?

Yes: runners who reach the La Cresse junction, around km 10, after 10 am are diverted onto the 23 km course. The finish at the Parc de la Victoire stays open until 4 pm.

Can you switch from the marathon to the 100 km during the race?

No. You choose your distance when you enter, and the bibs are different. A marathon runner cannot carry on into the 100 km, and a 100 km runner who stops in Millau is counted as a DNF.

Millau 100 km et Marathon: how many weeks of preparation?

For an athlete at intermediate level, Endu builds a 17-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 4 sessions per week. You choose 3 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.

Millau 100 km et Marathon 2027: date, course and training plan

42.2 km · 220 m D+Millau2027 edition: date not announced yet

Since 17 September 1972, the 100 km de Millau has been run on the last Saturday of September, on the roads of southern Aveyron. One start, on Avenue Jean-Jaurès at 8 am, launches three races: the 100 km ultra, a marathon that follows its first loop along the Tarn via Le Rozier and Peyreleau, and a 23 km race. The 54th edition took place on Saturday 26 September 2026; the 2027 date is not announced yet.

Your plan for Millau 100 km et Marathon

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

Your goal time?

14-day trial, cancel anytime.

Millau 100 km et Marathon at a glance

Date: 2027 edition: date not announced yet2026 edition: 26 September 2026
Formats: Marathon 42 kmPlan below — 42.195 km on road, 220 m of climbing, one loop from Millau back to Millau via Le Rozier and Peyreleau, finishing at the Parc de la Victoire. 7 aid stations. Runners reaching the La Cresse junction (km 10) after 10 am are diverted onto the 23 km course; the finish stays open until 4 pm. In 2026: €65 until 30 June, €70 in July and August, €75 from 1 September.
Ultra 100 km — 100 km on road, 1,100 m of climbing: the marathon loop, then an out-and-back between Millau and Saint-Affrique passing twice under the Millau Viaduct. 18 hours maximum (finish before 2 am), with cut-offs including 4 pm at Millau (km 42) and 8 pm at Saint-Affrique (km 71). One support cyclist allowed from Aguessac (km 7). In 2026: €90 until 30 June, €100 in July and August, €110 from 1 September (€4 less for FFA licence holders).
Semi 23 km — 23 km, 50 m of climbing. Same start and same course to about km 10, then across the Tarn at La Cresse and back to Millau via Paulhe. Limited to 600 starters in 2026. €35 to €45 in 2026.
Registration: Entries online on the official website, or by post with the downloadable form. In 2026 they closed at midnight on 20 September, with no entries on race day. 2026 prices for the marathon: €65 until 30 June, €70 in July and August, €75 from 1 September; for the 100 km: €90, €100 then €110. An FFA licence for the 2026-2027 season (Athlé Compétition, Entreprise or Running) or a PPS health pass is required; races are open from the FFA Espoirs (under-23) category. You enter one distance only: you cannot extend a marathon into the 100 km, nor stop a 100 km at the marathon and be ranked. No refunds or deferrals. Bib pick-up at the function hall in the Parc de la Victoire, Friday from 4 pm to 10 pm and Saturday from 6 am to 7:30 am. The 2027 registration dates are not published yet.
Official website: 100kmdemillau.com

The 2026 course

Start on Avenue Jean-Jaurès at 8 am, after a procession from the Parc de la Victoire. The loop heads up the Tarn valley through Aguessac (km 7), past the La Cresse junction (km 10), then Rivière-sur-Tarn (km 12) and Boyne (km 17). It reaches Le Rozier, where the Jonte gorges begin, and Peyreleau (km 21), then comes back down the other bank: Les Prades campsite (km 25), La Cresse (km 31), Paulhe (km 34). Finish in Millau, at the Parc de la Victoire. Traffic is not closed in Millau itself: runners follow the highway code.

What the race asks of your training

A course not built for fast times

The organisers say so themselves: the profile is far from what record-chasing runners look for. The marathon has 220 m of climbing, spread over roads that roll along both banks of the Tarn. Add hills and rolling long runs to your build-up, and aim for an even effort rather than a set pace per kilometre.

Seven aid stations, then 8 km without

Aid stations at Aguessac (km 7), Rivière-sur-Tarn (km 12), Boyne (km 17), Peyreleau (km 21), Les Prades campsite (km 25), La Cresse (km 31) and Paulhe (km 34), then nothing until the finish. Carrying your own supplies is allowed: if you rely on your own gels or drink, test them on your long runs.

The marathon as a trial run for the 100 km

According to the organisers, the marathon is often a first taste for runners who want to try the 100 km the following year. The plan below prepares you for the marathon. The 100 km is another matter: 1,100 m of climbing, 18 hours maximum, cut-offs at 4 pm in Millau and 8 pm in Saint-Affrique, and a stretch at night, with lights and a hi-vis vest required from dusk. It takes far more volume and long runs.

The plan below prepares the Marathon 42 km format, for an athlete at intermediate level with 4 days available per week. Until the official date is out, the example is set for 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: 17
sessions: 67
sessions / week: 4
peak week: 5.7 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 3–7 · 5 wk
Build
Weeks 8–11 · 4 wk
Specific
Weeks 12–14 · 3 wk
Taper
Weeks 15–16 · 2 wk
Race week
Weeks 17–17 · 1 wk

Volume progression

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

Wk	Phase	Hours	km
1	General preparation	3.3 h	33
2	General preparation	3.5 h	35
3	Baserecovery	2.7 h	27
4	Base	3.7 h	37
5	Base	3.9 h	39
6	Base	4.1 h	41
7	Baserecovery	3.2 h	32
8	Build	4.4 h	44
9	Build	4.6 h	47
10	Build	4.9 h	50
11	Buildrecovery	3.8 h	39
12	Specific	5.1 h	51
13	Specific	5.4 h	54
14	Specific	5.7 h	57
15	Taper	4.1 h	41
16	Taper	3.2 h	31
17	Race week	2.2 h	22

Sample week — week 9 (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.

MondayEasy
30 min easy
30 min · 4.8 km
TuesdayHard
3 × 10 min at threshold
2 min jog recovery
1 h 01 · 11.4 km
FridayVery hard
6 × 600 m at MAS
2 min jog recovery
52 min · 9.6 km
SundayEasy
Long run 2 h 13
2 h 13 · 21.5 km

Example generated for a intermediate-level profile (MAS 15 km/h, 4 days available per week). Your plan will depend on your level, availability and feedback.

This plan’s check-up

Pass

A 17-week build (recommended minimum: 12); a longest run never more than 8% above the previous month’s; volume rising at most 7% from one week to the next; 89% of the time at easy effort; the longest session 3 weeks before the race; a taper cutting volume by 61% in race week.

2 worth knowing · 16 checks passed

Remarks

Strength training — No strength session.
Fueling — Long sessions (up to 160 min in this plan) are where race fueling is rehearsed.

The 16 checks passed, in detail

Length of the build — 17 weeks: enough for this race (recommended minimum: 12).
Sessions per week — 4 sessions a week: the minimum for this race is met.
Volume progression — Running volume rises at most 7% from one week to the next (a signal appears beyond 20%).
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 3, 7, 11, 15).
Weight of the long run — The long run keeps a reasonable share of the week.
Intensity distribution — About 89% of the time at easy effort: the most common distribution among trained endurance athletes.
Demanding sessions — No more than 2 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.
Easy run pace — Easy runs are truly easy (slower than 5:43/km).
Race-specific work — 8 race-specific sessions in the last block.
Timing of the longest session — The longest session falls 3 weeks before the race: the right time.
Taper — Volume drops 61% 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 (100%).

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.

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

“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
“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

Your plan, not a template athlete's

This plan is generated for an athlete at intermediate level with 4 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 Millau 100 km et Marathon