Marathon du Mont-Blanc
ABOUT
About Marathon du Mont-Blanc
The Marathon du Mont-Blanc is the iconic late-June trail festival in Chamonix. The event gathers seven formats — from the KM Vertical time-trial to the 90 km du Mont-Blanc, through the Marathon, the Cross, the 23 km, the 10 km and the MiniCross —, with a historic finish on Place du Triangle de l'Amitié.
PICK YOUR RACE
The course, estimator and times below adapt to your pick
Current pick: Marathon du Mont-Blanc — Trail du Mont-Blanc 2026 · 42 km · 2,500 m D+
The presentation above is shared across Marathon du Mont-Blanc · the blocks below (course, estimator, results, logistics, weather…) reflect your pick.
BLOCK 2 · COURSE
42 km, 2,500 m climb
Course map, elevation profile, notable segments, aid stations and cutoffs.
AID STATIONS & CUTOFFS
Course breakdown, aid station by aid station
Every checkpoint with its cutoff, distance and elevation gain since the previous one, and available services.
| Step | Km | Checkpoint | From prev. | Gain | Loss | Cutoff | Services |
|---|---|---|---|---|---|---|---|
| 1 | 13.5 | Le Tour | — | — | — | — | 💧🍞🎒 |
| 2 | 18 | Col des Posettes | +4.5 km | — | — | — | 💧🍞🎒 |
| 3 | 23.5 | Vallorcine | +5.5 km | — | — | — | 💧🍞🎒 |
| 4 | 29 | Tre-le-Champ | +5.5 km | — | — | — | 💧🍞🎒 |
| 5 | 34.2 | La Flegere | +5.2 km | — | — | — | 💧🍞🎒 |
| 6 | 42 | Arrivee Chamonix | +7.8 km | — | — | — | 💧🍞🎒 |
💧 water · 🍞 food · 🎒 drop bag · 👥 crew. Values with ~ : derived from aid-station altitude (will sharpen once the GPX is parsed).
BLOCK 3 · ESTIMATOR
Your real finish time
Link your data or your ITRA, we calibrate against the historical peloton.
What's your real finish time?
Link Strava, Coros, Garmin or Suunto — or use your ITRA. We compare your profile to thousands of finishers and compute your time with confidence interval.
Ballpark by profile. Compute yours in 2 min.
- ~6h09
Trained runner
Top 10 % of finishers
- ~7h49
Regular runner
Around the median
- ~10h03
Conservative pace
Comfortable margin
BLOCK 4 · DATA & RESULTS
2025 edition — times and roll of honour
Winners, median time, finish rate, distribution. Claim your finish to reveal your full name.
Find your finish time
Search across all historical finishers.
No results yet for Trail du Mont-Blanc 2026 2025.
Results are added shortly after each edition.
BLOCK 5 · LOGISTICS
Pre-race essentials
How to get there (train, carpool), bib pickup, mandatory gear, and everything you need to know on-site.
How to get there
Pick your way in
Come by train
Get to the race by train
Type your nearest station — we'll send you to SNCF Connect.
Dates on SNCF Connect must be re-selected on the next page (their URL doesn't yet carry them).
Carpool
Share the ride with other runners
Soon: a per-race carpool thread with direct runner-to-runner listings. In the meantime, check BlaBlaCar or local Facebook groups.
On site
Shuttles, bibs, parking, lodging
LOGISTICS
Logistics and access
- Shuttles
- Train gratuit depuis gare de Chamonix vers Le Buet. 40% dossards pour participants arrivant en train/bus.
- Bib pickup
- Espace EMC2, Place du Mont-Blanc, Chamonix. Samedi 27 juin 2026, 9h00-21h00. RDV obligatoire a prendre avant le 19 juin 2026. Controle materiel au retrait.
Crew & supporters
Where your crew can meet you, what they can hand off, and where family can come cheer.
Authorized crew zones
No crew zones documented
ContributeViewing spots
No supporter spots identified yet
Pass windows will be computed as soon as we know your estimate.
Estimate my timeNeed a crew on this race?
A local who knows the trail, speaks your language, and waits at the aid station at 3 AM.
Weather & conditions
Plan for conditions up to 2,100 m altitude.
Forecast unavailable for this race
The weather service didn't reply. Try again later.
BLOCK 8 · COMMUNITY
From finishers, for finishers
Ratings, race reports, photos, Q&A. What you won't read on the official site.
Frequently asked questions
What is the distance of the Trail du Mont-Blanc?
The Trail du Mont-Blanc covers 42 km with 2,500 m of elevation gain, starting from Chamonix in Haute-Savoie. A marathon trail in the legendary Mont-Blanc massif setting.
When is the next edition?
The next edition is scheduled for June 28, 2026.
How do I register?
Registration is available online on the official website. Due to the race's popularity, spots fill up very quickly. A medical certificate and ITRA points may be required.
What mandatory gear is required?
Mandatory gear is strict: water reserve (1.5L minimum), charged phone, emergency blanket, whistle, waterproof jacket, warm clothing, gloves, hat, and headlamp. The complete list is on the official website.
What are the cut-off times?
Cut-off times are enforced at each aid station. The mountain terrain difficulty is taken into account. Runners must meet every checkpoint time.
Is crew support allowed?
Crew access zones are available along the course, including in Chamonix. As Chamonix is an international trail destination, goodborning is especially useful for foreign runners looking for a local assistant.
Do you organize this race?
25 June 2026
J-14