When is the CCC 2027?

The date has not been announced yet. In 2026, the race started on Friday 28 August at 9 am in Courmayeur, the same day as the UTMB start in Chamonix, during UTMB Mont-Blanc week from 24 to 30 August.

How do you get into the CCC?

By lottery, held in January for the summer race in 2026. You need at least one Running Stone earned in the previous 24 months on a UTMB World Series race, and a valid UTMB Index in 50K, 100K or 100M. The more Running Stones you hold, the better your chances. Some runners also earn direct qualification on circuit races.

Where does the CCC go?

From Courmayeur, in Italy, over the Grand Col Ferret into Switzerland: La Fouly, Champex-Lac, Trient. Back into France at Vallorcine, up to the Cheserys valley and La Flégère, then the finish in the heart of Chamonix.

CCC (Courmayeur-Champex-Chamonix): how many weeks of preparation?

For an athlete at intermediate level, Endu builds a 25-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 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.

CCC (Courmayeur-Champex-Chamonix) 2027: date, course and training plan

108 km · 6,200 m D+Courmayeur2027 edition: date not announced yet

The CCC links Courmayeur to Chamonix through Italy, Switzerland and France: 108 km and 6,200 m of climbing in 2026, over the Grand Col Ferret and through La Fouly, Champex and Trient. It is the 100K-category final of the UTMB World Series circuit, and entry is by lottery, with Running Stones. The 2027 date has not been announced yet.

Your plan for CCC (Courmayeur-Champex-Chamonix)

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

Your level?

14-day trial, cancel anytime.

CCC (Courmayeur-Champex-Chamonix) at a glance

Date: 2027 edition: date not announced yet2026 edition: 28 August 2026
Formats: CCCPlan below — 108 km and 6,200 m of climbing in 2026. Start in the centre of Courmayeur on Friday 28 August 2026 at 9 am, finish in the heart of Chamonix. Stated time limit: 28 hours. The UTMB World Series 100K final: finishing the CCC does not earn a Running Stone. €310 in 2026.
Les autres courses de la semaine — The same week, UTMB Mont-Blanc also hosts the UTMB, TDS, OCC, PTL, MCC, ETC and YCC, among others. A runner may only take part in one race during the week.
Registration: The 2027 entry conditions have not been published yet. In 2026, the CCC was drawn by lottery: pre-registration from 8 January 2026 at 11 am to 19 January 2026 at 11:59 pm (Paris time), results on 22 January, then confirmation and payment before 4 February. To enter the draw, you needed at least one Running Stone earned in the previous 24 months and a valid UTMB Index in 50K, 100K or 100M. Each Running Stone counts as one chance; if you are drawn, all the Running Stones you entered with are used up, and a drawn runner who fails to confirm in time loses half of theirs. 2026 price: €310, including transport to the start.
Official website: montblanc.utmb.world/fr/races/CCC

The 2026 course

Start in the centre of Courmayeur (1,221 m). Climb to the Tête de la Tronche (2,543 m), facing Mont Blanc and the Grandes Jorasses, then a balcony path past the Bertone and Bonatti huts to Arnouvaz and the Elena hut. Over the Grand Col Ferret (2,527 m) into Switzerland, down past La Peule to La Fouly, then Praz-de-Fort and Champex-Lac (hot meal). The course continues via Plan de l’Au and La Giète to Trient, climbs back up to Les Tseppes and drops to Vallorcine, back in France. Final climb via the Col des Montets, the Tête de Béchar and the Cheserys valley to La Flégère, then the descent to the finish, right in the heart of Chamonix.

What the race asks of your training

Up to 2,500 m straight from the start

On the official 2026 profile, the race climbs from Courmayeur (1,221 m) to the Tête de la Tronche (2,543 m) in under 10 km. The Grand Col Ferret (2,527 m) comes later. Long, steady climbs, running or power-hiking, and a few runs at altitude teach you to get through this opening section without going into the red.

A night in Switzerland

Starting at 9 am, many runners cross Switzerland in the evening and at night, between La Fouly, Champex-Lac and Trient, before re-entering France at Vallorcine. A few long runs finished by headtorch prepare you to run mountain trails at night and to keep eating.

A merciless final climb

The organisers call the final climb, after Vallorcine, up to the Cheserys valley merciless, before the descent into Chamonix. Repeated climbs at the end of long runs, and leg strength work for the descents, help you keep some strength for the last 20 km.

Semi-self-sufficiency

The rules require you to leave each aid station with enough to reach the next one, and to carry all the mandatory kit, with no disposable cups. On the CCC, missing a water reserve, a hooded waterproof jacket, a light, a survival blanket or a smartphone means disqualification. Do your long runs with a loaded pack and test your gels or drink in training.

The plan below prepares the CCC format, for an athlete at intermediate level with 4 days available per week. Until the official date is out, the example is set for August 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: 25
sessions: 100
sessions / week: 4
peak week: 10.9 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 3–10 · 8 wk
Build
Weeks 11–16 · 6 wk
Specific
Weeks 17–22 · 6 wk
Taper
Weeks 23–24 · 2 wk
Race week
Weeks 25–25 · 1 wk

Volume progression

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

Wk	Phase	Hours	km	Elev.
1	General preparation	6.3 h	42	1,196 m
2	General preparation	6.6 h	45	1,362 m
3	Baserecovery	5.1 h	36	801 m
4	Base	6.6 h	44	1,272 m
5	Base	7 h	47	1,374 m
6	Base	7.3 h	49	1,471 m
7	Baserecovery	5.7 h	39	972 m
8	Base	7.3 h	47	1,549 m
9	Base	7.8 h	51	1,648 m
10	Base	8.1 h	52	1,770 m
11	Buildrecovery	6.3 h	42	1,197 m
12	Build	8.2 h	51	1,925 m
13	Build	8.9 h	57	2,062 m
14	Build	8.9 h	56	2,100 m
15	Buildrecovery	7 h	47	1,462 m
16	Build	9.3 h	57	2,257 m
17	Specific	9.7 h	59	2,428 m
18	Specific	9.9 h	60	2,433 m
19	Specificrecovery	7.7 h	50	1,557 m
20	Specific	10.2 h	62	2,610 m
21	Specific	10.6 h	65	2,640 m
22	Specific	10.9 h	66	2,797 m
23	Taper	6.9 h	45	1,564 m
24	Taper	5.4 h	39	543 m
25	Race week	3.6 h	30	90 m

Sample week — week 14 (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.

TuesdayModerate
3 × (8 min climb + 4 min descent)
51 min · 6 km
FridayEasy
56 min easy
56 min · 7.5 km
SaturdayEasy
Back-to-back long run
2 h 04 · 12 km
SundayEasy
Long run 5 h 03
5 h 03 · 30 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 with remarks

A 25-week build (recommended minimum: 20); a longest run never more than 10% above the previous month’s; volume rising at most 8% from one week to the next; 96% of the time at easy effort; the longest session 3 weeks before the race; a taper cutting volume by 67% in race week.

1 worth a look · 2 worth knowing · 15 checks passed

Remarks

Climbing in the busiest week — The busiest week climbs only 2797 m, for 6200 m on race day.
Strength training — No strength session.
Fueling — Long sessions (up to 360 min in this plan) are where race fueling is rehearsed.

The 15 checks passed, in detail

Length of the build — 25 weeks: enough for this race (recommended minimum: 20).
Sessions per week — 4 sessions a week: the minimum for this race is met.
Volume progression — Running volume rises at most 8% from one week to the next (a signal appears beyond 20%).
Long run increase — Each week, the longest run is at most 10% longer than the longest of the previous month (benchmark: 10%).
Lighter weeks — A lighter week comes back regularly (weeks 3, 7, 11, 15, 19, 23).
Intensity distribution — About 96% 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.
Climbing in training — The plan prepares the climbs and descents (32 sessions with elevation).
Timing of the longest session — The longest session falls 3 weeks before the race: the right time.
Taper — Volume drops 67% 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%).
Back-to-back long runs — The plan has back-to-back long runs (9 weekends).

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.

Elevation as the central variable

Weekly climbing volume, long hilly runs, downhill technique and power-hiking for ultras: a trail plan is not a road plan with bumps.

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 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
“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
“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 CCC (Courmayeur-Champex-Chamonix)