90km du Mont-Blanc - Elevation Profile, Aid Stations and Cutoffs
90km du Mont-Blanc is a 88.8 km ultra-trail with around 6,137 m of elevation gain, starting in Chamonix, France. The overall cutoff is 24 hours 20 minutes. The highest point on the course is Brevent at 2,471 m.
- Distance
- 88.8 km
- Elevation
- +6,137 m -6,137 m
About 69 m of climb per km
- Highest point
- 2,471 m
Brevent
Next edition Fri 25 Jun 2027 · 04:45
in about 9 months- Start
- Sunrise Chamonix, France 0h58 after the start
- Winner ~9h37 9h37 after the start
- Median finisher 2026 median 18h37 after the start
- Cutoff 24h20 after the start
A median finisher runs 2h52 in the dark.
Race details
Explore the 90km du Mont-Blanc course, kilometre by kilometre
Built from the organiser's course data, set to the 04:45 start.
- Map Interactive map
- Profile Elevation profile
- Checkpoints Checkpoints and cutoffs
- Weather Race-day weather
The biggest climb between checkpoints gains around 1,556 m from Start - Chamonix (km 0) to Brevent (km 10.2). The steepest sustained section on the elevation profile averages about 25% over roughly 2.7 km around km 38. Crew access is allowed at Planpraz (12.7 km), Le Buet (28.5 km), Emosson (40.6 km), Les Esserts (48.4 km), Le Tour (60.1 km), Les Bois (69.7 km) and Montenvers (75.2 km).
Data is approximate and courses change between editions - always verify against the official race guide.
Enter a goal finish time and see estimated arrivals vs checkpoint cutoffs.
Plan against barriersOne Strava connection reads your last 90 days and estimates your finish on this course. Free, no plan needed.
Elevation profile
Course math
Four numbers worked out from this course's distance, elevation and checkpoints.
TrailMath effort-km
181 effort-km
About 21 h for a mid-pack finisher (index 500). Not a pacing guarantee.
Distance + gain ÷ 100 + loss ÷ 200, beside ITRA's gain-only km-effort. Model TM1.0.
How TrailMath works →UTMB Index category
100K
150 km-effort (distance + gain ÷ 100). Calculated from the course figures, not an official classification.
Estimate your UTMB Index →Biggest climb section
+1,556 m
Chamonix → Brevent · km 0–10.2
The largest gain between two checkpoints, not one continuous climb.
Biggest descent section
−1,163 m
Plan de l'Aiguille → Chamonix (Finish) · km 81.2–88.8
The largest loss between two checkpoints. ITRA's km-effort ignores descent; TrailMath counts it: 181 km-effort.
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90km du Mont-Blanc · 2026
Finish times, 2026 edition
650 runners finished. Half of them took longer than 18:36:31. That left the median finisher 5:43:17 inside the 24h20 cutoff.
Median finish
18:36:31
Half of the 650 finishers were still out there at this point.
5:43:17 in hand before the 24h20 cutoff
Average 18:10:38, 0:25:53 quicker than the median: a fast front pulls it down.
The start line
Men and women
Two medians on the same scale. The bars run from the start to the cutoff, so the gap between them is the gap in time.
Men
18:39:44
median finish; average 18:13:57
570 finishers, 88% of the field
Women
17:55:40
median finish; average 17:47:01
80 finishers, 12% of the field
0:44:04 separates the two medians, across 570 men and 80 women.
Finish time by age group
Every track runs from the start to the 24h20 cutoff, so the empty part of a bar is the time that group's median finisher still had. Men and women are drawn on the same scale.
| Age | Median finish | Median against the cutoff | Finishers |
|---|---|---|---|
| ES | 15:35:01 | 10 - small sample, read with care | |
| SE | 17:49:46 | 234 | |
| M0 | 18:39:52 | 122 | |
| M1 | 19:05:32 | 91 | |
| M2 | 19:29:20 | 54 | |
| M3 | 19:44:20 | 40 | |
| M4 | 19:50:55 | 13 - small sample, read with care | |
| M5 | 20:21:21 | 6 - small sample, read with care |
| Age | Median finish | Median against the cutoff | Finishers |
|---|---|---|---|
| ES | - | 1 - too few finishers to publish a time | |
| SE | 17:08:43 | 31 | |
| M0 | 17:13:55 | 22 | |
| M1 | 17:39:08 | 17 - small sample, read with care | |
| M2 | - | 2 - too few finishers to publish a time | |
| M3 | 20:21:00 | 4 - small sample, read with care | |
| M4 | 22:10:19 | 3 - small sample, read with care |
Full bar: 20 finishers or more. Tick alone: fewer than 20, too few for a median to say much. The shaded row is the biggest group.
Where the finishers came from
88% of the finishers came from France alone.
| Nation | Finishers | Share |
|---|---|---|
| France FR | 569 87.5% | |
| Belgium BE | 19 2.9% | |
| Italy IT | 12 1.8% | |
| United Kingdom GB | 6 0.9% | |
| Switzerland CH | 5 0.8% | |
| Portugal PT | 5 0.8% | |
| Curaçao AN | 4 0.6% | |
| Germany DE | 4 0.6% | |
| United States US | 4 0.6% | |
| Netherlands NL | 3 0.5% | |
| Poland PL | 3 0.5% | |
| Argentina AR | 2 0.3% | |
| Czechia CZ | 2 0.3% | |
| Denmark DK | 2 0.3% | |
| Canada CA | 1 0.2% | |
| China CN | 1 0.2% | |
| Spain ES | 1 0.2% | |
| Finland FI | 1 0.2% | |
| Hong Kong SAR China HK | 1 0.2% | |
| Luxembourg LU | 1 0.2% | |
| Norway NO | 1 0.2% | |
| Peru PE | 1 0.2% | |
| Romania RO | 1 0.2% | |
| Sweden SE | 1 0.2% | |
| 14 other nations 4 other nations | 19 2.9% 4 0.6% |
Showing 20 of 24 nations. Showing 24 of 24 nations.
Bar length is against the largest nation. The smallest counts are drawn at a minimum visible width, so their bars are not to scale.
How these numbers were computed
These are times for runners who finished. They exclude everyone who started and did not, so they describe how long finishing took, not how long the race takes. Bands with only a handful of finishers move a lot from one edition to the next.
We plot the median, not the average. A handful of very quick runners drags the average well below the time half the field actually beat, so the median is the honest number to plan against.
Nationality here shows who travels to this race, not who runs it best. That alone is why a host nation tops almost every list.
Computed from the full official results, verified September 29, 2026 - Official results
Ask the course
Ask 90km du Mont-Blanc anything about climbs, pacing, crew or cutoffs.
Answers come from this course's data, your plan and your training.
Which climb should I respect most?
Chamonix to Brevent: +1,556 m over 10.2 km, straight from the gun. Hike the steep sections at an effort you could hold for hours - the race is decided after this climb, not on it.
Where can my crew meet me?
Planpraz, km 12.7 - the first of 7 crew points. The next is Le Buet, km 28.5. Have them bring warm layers: the course tops out at 2,471 m, through the night, in June.
Is 18h a realistic finish for me?
18h would put you in the faster half of 2026 finishers - the median was 18:36:31. It means holding 12:10/km overall.
The Coach answers that once it can see your training.
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Example answer
Your long runs peak at 25 km, so the plan builds to 4-hour long runs, two of them at night. Cutoff buffer at Le Chatelard: 1h59.
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~39 weeks · peak ~8 h/week · 5 run + 2 strength days
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Aid stations and checkpoints
| Checkpoint | Km | Cumulative gain (m) | Cumulative loss (m) | Cutoff | Crew | Drop bag |
|---|---|---|---|---|---|---|
| Start - Chamonix | 0 | 0 | 0 | - | - | - |
| Brevent | 10.2 | 1,556 | 122 | - | No | No |
| Planpraz | 12.7 | 1,601 | 603 | - | Yes | No |
| La Flegere | 18 | 1,741 | 887 | Fri 09:35 | No | No |
| Tete aux Vents | 21.7 | 2,054 | 967 | - | No | No |
| Le Buet | 28.5 | 2,079 | 1,771 | Fri 11:35 | Yes | No |
| La Villaz | 35.1 | 2,526 | 2,234 | Fri 13:05 | No | No |
| Emosson | 40.6 | 3,282 | 2,347 | Fri 15:05 | Yes | No |
| Le Chatelard | 44.7 | 3,319 | 3,203 | Fri 16:05 | No | No |
| Les Esserts | 48.4 | 3,857 | 3,250 | - | Yes | No |
| Alpage de Catogne | 51 | 4,214 | 3,250 | - | No | No |
| Col des Posettes | 55.1 | 4,562 | 3,604 | - | No | No |
| Le Tour | 60.1 | 4,645 | 4,207 | Fri 20:20 | Yes | No |
| Les Bois | 69.7 | 4,835 | 4,793 | Fri 22:20 | Yes | No |
| Montenvers | 75.2 | 5,660 | 4,793 | Sat 00:50 | Yes | No |
| Le Signal | 77 | 5,966 | 4,814 | - | No | No |
| Plan de l'Aiguille | 81.2 | 6,127 | 4,974 | Sat 02:50 | No | No |
| Chamonix (Finish) | 88.8 | 6,137 | 6,137 | Sat 05:05 | Yes | No |
Data is approximate and courses change between editions - always verify against the official race guide. Source: official race guide, verified September 29, 2026 - Official race website
FAQ
How much elevation gain does 90km du Mont-Blanc have?
90km du Mont-Blanc has around 6,137 m of cumulative elevation gain and 6,137 m of loss over 88.8 km.
What is the cutoff time for 90km du Mont-Blanc?
The overall 90km du Mont-Blanc cutoff is 24 hours 20 minutes, with intermediate time barriers at major checkpoints. Winning times are typically around 10 hours.
How long is 90km du Mont-Blanc?
90km du Mont-Blanc covers approximately 88.8 km, starting in Chamonix, France.
What is the highest point of 90km du Mont-Blanc?
The highest point of 90km du Mont-Blanc is Brevent at 2,471 m.
How many aid stations does 90km du Mont-Blanc have and which allow crew?
The checkpoint table lists 16 major aid points between the start and the finish. Crew access is allowed at Planpraz (12.7 km), Le Buet (28.5 km), Emosson (40.6 km), Les Esserts (48.4 km), Le Tour (60.1 km), Les Bois (69.7 km) and Montenvers (75.2 km).
Training for this race?
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