UTMB Mont-Blanc - Elevation Profile, Aid Stations and Cutoffs
- Chamonix-Mont-Blanc, France
- 174 km
- 10,000 m D+
- 22 aid stations
Map, checkpoints and cutoffs Map · checkpoints · forecast opens Aug 18 Race-day forecast is live
Race-day conditions
Weather, daylight and your arrival time at all 24 checkpoints, set to the 19:45 start.
- Start
- 19:45
- Daylight at the start
- 06:46-20:21
- Aid stations
- 22
Course profile
Chamonix-Mont-Blanc, France
- Distance
- 174 km
- Elevation
- +10,000 m -10,000 m About 57 m of climb per km
- Highest point
- 2,537 m Grand Col Ferret
Next edition Est. Fri 27 Aug 2027
Our estimate for Fri 27 Aug 2027. The organiser has not announced the date for this race yet.
- Start
- Sunset 0h37 after the start
- Sunrise 11h03 after the start
- Winner ~20h 20h after the start
- Median finisher 2026 median 38h10 after the start
- Cutoff 45h45 after the start
A median finisher runs 20h55 in the dark.
UTMB Mont-Blanc is a 174km ultra-trail with around 10,000m of elevation gain that circumnavigates the Mont-Blanc massif through France, Italy, and Switzerland, starting and finishing in Chamonix. The overall cutoff is 45 hours 45 minutes, and the highest point on the course is the Grand Col Ferret at 2,537m.
The race starts in Chamonix on Friday evening and crosses three countries via a chain of high mountain passes. Crew are allowed at Les Contamines, Courmayeur, Champex-Lac, and Vallorcine. Night running is guaranteed for every finisher - most runners see two nights on course.
Data is approximate and courses change between editions - always verify against the official race guide.
Other distances at UTMB Mont-Blanc
Plan against the cutoffs
Enter a goal finish time and see estimated arrivals vs checkpoint cutoffs.
Estimate your finish
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Course math
Four numbers worked out from this course's distance, elevation and checkpoints.
TrailMath effort-km
324 effort-km
About 43 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
100M
274 km-effort (distance + gain ÷ 100). Calculated from the course figures, not an official classification.
Estimate your UTMB Index →Biggest climb section
+1,053 m
Les Chapieux → Col de la Seigne · km 52.2–62.9
The largest gain between two checkpoints, not one continuous climb.
Les Chapieux cutoff: Sat 07:15
Plan against barriers →Biggest descent section
−1,161 m
La Flegere → Chamonix (Finish) · km 166.6–174
The largest loss between two checkpoints. ITRA's km-effort ignores descent; TrailMath counts it: 324 km-effort.
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UTMB Mont-Blanc · 2026
Finish times, 2026 edition
2,398 runners started. 1,676 came back. Half of them took longer than 38:10:03. That left the median finisher 7:34:57 inside the 45h45 cutoff.
Median finish
38:10:03
Half of the 1,676 finishers were still out there at this point.
7:34:57 in hand before the 45h45 cutoff
Average 36:50:45, 1:19:18 quicker than the median: a fast front pulls it down.
The start line
69.9%
1,676 of 2,398 starters made it; 722 did not.
still moving when a cutoff closed
stopped by choice or by the medics
Organisation stops and disqualifications: 4.
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
38:03:10
median finish; average 36:45:35
1,409 finishers, 84% of the field
Women
38:44:11
median finish; average 37:18:01
267 finishers, 16% of the field
0:41:01 separates the two medians, across 1,409 men and 267 women.
Finish time by age group
Every track runs from the start to the 45h45 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 |
|---|---|---|---|
| 20-34 | 33:59:03 | 277 | |
| 35-39 | 35:52:08 | 263 | |
| 40-44 | 37:38:25 | 328 | |
| 45-49 | 39:07:35 | 270 | |
| 50-54 | 41:25:54 | 171 | |
| 55-59 | 41:38:33 | 74 | |
| 60-64 | 42:03:10 | 21 | |
| 65-69 | 44:54:39 | 3 - small sample, read with care | |
| 70-74 | - | 2 - too few finishers to publish a time |
| Age | Median finish | Median against the cutoff | Finishers |
|---|---|---|---|
| 20-34 | 34:28:13 | 56 | |
| 35-39 | 36:43:40 | 69 | |
| 40-44 | 38:38:49 | 46 | |
| 45-49 | 39:29:51 | 38 | |
| 50-54 | 40:52:18 | 34 | |
| 55-59 | 42:37:58 | 15 - small sample, read with care | |
| 60-64 | 43:05:46 | 7 - small sample, read with care | |
| 65-69 | - | 2 - too few finishers to publish a time |
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
40% of the finishers came from France alone.
| Nation | Finishers | Share |
|---|---|---|
| France FR | 672 40.1% | |
| United States US | 109 6.5% | |
| Japan JP | 73 4.4% | |
| United Kingdom GB | 71 4.2% | |
| Spain ES | 65 3.9% | |
| Italy IT | 64 3.8% | |
| China CN | 56 3.3% | |
| Australia AU | 52 3.1% | |
| Belgium BE | 46 2.7% | |
| Switzerland CH | 37 2.2% | |
| Poland PL | 37 2.2% | |
| Hong Kong SAR China HK | 27 1.6% | |
| Germany DE | 25 1.5% | |
| Netherlands NL | 24 1.4% | |
| Argentina AR | 23 1.4% | |
| Canada CA | 21 1.3% | |
| Sweden SE | 16 1.0% | |
| Brazil BR | 15 0.9% | |
| Portugal PT | 14 0.8% | |
| South Korea KR | 13 0.8% | |
| Thailand TH | 12 0.7% | |
| Czechia CZ | 10 0.6% | |
| Mexico MX | 10 0.6% | |
| Norway NO | 10 0.6% | |
| Slovenia SI | 9 0.5% | |
| Türkiye TR | 9 0.5% | |
| Denmark DK | 8 0.5% | |
| Ireland IE | 8 0.5% | |
| New Zealand NZ | 8 0.5% | |
| Slovakia SK | 7 0.4% | |
| Finland FI | 6 0.4% | |
| Romania RO | 6 0.4% | |
| South Africa ZA | 6 0.4% | |
| Curaçao AN | 5 0.3% | |
| Costa Rica CR | 5 0.3% | |
| Hungary HU | 5 0.3% | |
| Malaysia MY | 5 0.3% | |
| Austria AT | 4 0.2% | |
| Israel IL | 4 0.2% | |
| Moldova MD | 4 0.2% | |
| North Macedonia MK | 4 0.2% | |
| Philippines PH | 4 0.2% | |
| Vietnam VN | 4 0.2% | |
| Bulgaria BG | 3 0.2% | |
| Greece GR | 3 0.2% | |
| Croatia HR | 3 0.2% | |
| Indonesia ID | 3 0.2% | |
| India IN | 3 0.2% | |
| Lithuania LT | 3 0.2% | |
| Uruguay UY | 3 0.2% | |
| Chile CL | 2 0.1% | |
| Colombia CO | 2 0.1% | |
| Ecuador EC | 2 0.1% | |
| Latvia LV | 2 0.1% | |
| Montenegro ME | 2 0.1% | |
| Puerto Rico PR | 2 0.1% | |
| Singapore SG | 2 0.1% | |
| Taiwan TW | 2 0.1% | |
| Ukraine UA | 2 0.1% | |
| Venezuela VE | 2 0.1% | |
| United Arab Emirates AE | 1 0.1% | |
| Albania AL | 1 0.1% | |
| Bosnia & Herzegovina BA | 1 0.1% | |
| Bangladesh BD | 1 0.1% | |
| Estonia EE | 1 0.1% | |
| Egypt EG | 1 0.1% | |
| Guatemala GT | 1 0.1% | |
| Iceland IS | 1 0.1% | |
| Sri Lanka LK | 1 0.1% | |
| Myanmar (Burma) MM | 1 0.1% | |
| Macao SAR China MO | 1 0.1% | |
| Mauritania MR | 1 0.1% | |
| Malta MT | 1 0.1% | |
| Mauritius MU | 1 0.1% | |
| Maldives MV | 1 0.1% | |
| Nicaragua NI | 1 0.1% | |
| Panama PA | 1 0.1% | |
| Paraguay PY | 1 0.1% | |
| Serbia RS | 1 0.1% | |
| Saudi Arabia SA | 1 0.1% | |
| Senegal SN | 1 0.1% | |
| Kosovo XK | 1 0.1% | |
| 72 other nations 62 other nations 52 other nations 42 other nations 32 other nations 22 other nations 12 other nations 2 other nations | 431 25.7% 216 12.9% 125 7.5% 75 4.5% 42 2.5% 22 1.3% 12 0.7% 2 0.1% |
Showing 20 of 82 nations. Showing 30 of 82 nations. Showing 40 of 82 nations. Showing 50 of 82 nations. Showing 60 of 82 nations. Showing 70 of 82 nations. Showing 80 of 82 nations. Showing 82 of 82 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.
Edition by edition
Every edition we have recomputed in full, newest first. The course, the weather and the field change from year to year, so a slower edition is not a harder one.
| Edition | Distance run | Starters | Finishers | Finish rate | Median finish |
|---|---|---|---|---|---|
| 2026 Latest | 174 km | 2,398 | 1,676 | 69.9% | 38:10:03 |
| 2025 | 174 km | 2,492 | 1,665 | 66.8% | 40:48:29 |
| 2024 | 176.4 km | 2,761 | 1,760 | 63.7% | 40:34:45 |
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 13, 2026 - Official results
Ask the course
Ask UTMB 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?
Les Chapieux to Col de la Seigne: +1,053 m over 10.7 km, from km 52.2. 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?
Les Contamines, km 32.4 - the first of 4 crew points. The next is Courmayeur, km 81.3. Have them bring warm layers: the course tops out at 2,537 m, through the night, in August.
Is 38h a realistic finish for me?
38h would put you in the faster half of 2026 finishers - the median was 38:10:03. It means holding 13:06/km overall.
The assistant answers that once it can see your training.
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To answer this for you, the Course Assistant uses your training and your race plan.
Example answer
Your long runs peak at 30 km, so the plan builds to 4-hour long runs, two of them at night. Cutoff buffer at Courmayeur: 1h11.
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~46 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 |
|---|---|---|---|---|
| Start - Chamonix Services not published | 0 | 0 | 0 | - |
| Col de Voza | 14.5 | 898 | 270 | - |
| Saint-Gervais | 22.9 | 1,040 | 1,266 | Sat 00:00 |
| Les Contamines Crew | 32.4 | 1,535 | 1,423 | Sat 02:00 |
| La Balme | 41.1 | 2,130 | 1,459 | Sat 04:00 |
| Refuge de la Croix du Bonhomme | 46.9 | 2,924 | 1,511 | - |
| Les Chapieux | 52.2 | 2,924 | 2,413 | Sat 07:15 |
| Col de la Seigne | 62.9 | 3,977 | 2,501 | - |
| Lac Combal | 67.8 | 3,977 | 3,047 | Sat 11:00 |
| Arete du Mont-Favre | 71.8 | 4,441 | 3,066 | - |
| Checrouit - Maison Vieille | 76.4 | 4,455 | 3,529 | - |
| Courmayeur Crew Drop bag | 81.3 | 4,475 | 4,316 | Sat 14:15 |
| Refuge Bertone | 86.6 | 5,288 | 4,344 | - |
| Refuge Bonatti | 94.2 | 5,600 | 4,610 | - |
| Arnouvaz | 99.4 | 5,727 | 4,983 | Sat 19:15 |
| Grand Col Ferret | 104 | 6,487 | 4,995 | - |
| La Fouly | 114 | 6,574 | 6,005 | Sat 23:45 |
| Champex-Lac Crew Drop bag | 127.5 | 7,086 | 6,649 | Sun 03:30 |
| La Giete | 138.9 | 7,880 | 7,030 | - |
| Trient | 144 | 7,943 | 7,675 | Sun 09:00 |
| Les Tseppes | 148 | 8,590 | 7,689 | - |
| Vallorcine Crew | 155.3 | 8,734 | 8,509 | Sun 12:15 |
| La Flegere | 166.6 | 9,687 | 8,839 | Sun 15:45 |
| Chamonix (Finish) Crew | 174 | 10,000 | 10,000 | Sun 17:30 |
Data is approximate and courses change between editions - always verify against the official race guide. Source: official race guide, verified September 7, 2026 - Official race website
FAQ
How much elevation gain does UTMB have?
UTMB has around 10,000m of cumulative elevation gain and the same amount of loss over 174km, spread across a chain of high passes around the Mont-Blanc massif.
What is the cutoff time for UTMB?
The overall UTMB cutoff is 45 hours 45 minutes, with intermediate time barriers at major checkpoints along the course. Winning times are typically around 20 hours.
How long is UTMB?
UTMB Mont-Blanc covers approximately 174km (about 108 miles) in a loop around the Mont-Blanc massif, starting and finishing in Chamonix and passing through France, Italy, and Switzerland.
What is the highest point of UTMB?
The highest point of the UTMB course is the Grand Col Ferret at 2,537m, crossed at roughly km 104 on the border between Italy and Switzerland.
What is the average UTMB finish time?
Across the 1,676 finishers of the 2026 edition the median finish time was 38:10:03 - half the field took longer than that - while the average was 36:50:45. The median is the figure to plan against: a fast front drags the average more than an hour below the time half the field actually beat. Men finished in a median 38:03:10 and women 38:44:11, and the median finisher crossed the line 7:34:57 inside the 45h45 cutoff.
How many people finish UTMB?
1,676 of the 2,398 starters finished the 2026 edition, a finish rate of 69.9 per cent. Of the 722 who did not finish, 164 were timed out at a cutoff and 554 withdrew, so most of the attrition was runners stopping rather than the clock stopping them.
How many aid stations does UTMB have and which allow crew?
The checkpoint table lists 23 major aid points between the start and finish in Chamonix. Crew access is allowed at Les Contamines (32.4km), Courmayeur (81.3km), Champex-Lac (127.5km), and Vallorcine (155.3km); drop bags at Courmayeur and Champex-Lac.
Training for this race?
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