Gran Trail Courmayeur - GTC55 - Elevation Profile, Aid Stations and Cutoffs
- Courmayeur, Valle d'Aosta, Italy
- 53.3 km33.1 mi
- 3,500 m11,483 ft D+
- 6 aid stations
- 3 ITRA points
Map, checkpoints and cutoffs Map · checkpoints · forecast opens Jul 1 Race-day forecast is live
Race-day conditions
Weather and daylight along the course and at all 8 checkpoints, set to the 07:00 start.
- Start
- 07:00
- Daylight at the start
- 05:51-21:22
- Aid stations
- 6
Course profile
Courmayeur, Valle d'Aosta, ItalyCourmayeur, Valle d'Aosta, Italy· point-to-point
Download the official GPX- Distance
- 53.3 km33.1 miFinishes 5 m lower than it startsFinishes 16 ft lower than it starts
- Elevation
- +3,500 m+11,483 ft-3,505 m-11,499 ftAbout 66 m of climb per kmAbout 347 ft of climb per mile
- Highest point
- 2,830 m9,285 ftMont Nix
Next editionEst. Sat 10 Jul 2027
Our estimate for Sat 10 Jul 2027. The organiser has not announced the date for this race yet.
- Start
- Winner~5h295h29 after the start
- Median finisher2026 median10h45 after the start
- SunsetCourmayeur, Valle d'Aosta, Italy14h23 after the start
- Cutoff18h after the start
Gran Trail Courmayeur - GTC55 is a 53.3 km ultra-trail with around 3,500 m of elevation gain, starting in Courmayeur, Valle d'Aosta, Italy. The overall cutoff is 18 hours. The highest point on the course is Mont Nix at 2,830 m. That is 66 m of climbing per kilometre. Gran Trail Courmayeur has 3 races, from 26.1 to 103 km; this one ranks 2 of 3 by distance and 3 of 3 by climbing per kilometre.
The biggest climb between checkpoints gains around 1,567 m from Start - Courmayeur (km 0) to Youlaz (km 15.12). The steepest sustained section on the elevation profile averages about 23% over roughly 2.5 km around km 8. Crew access is allowed at Youlaz (15.12 km), Mont Fortin (24.65 km), Lago Combal (36.1 km) and Rifugio Maison Vieille (44.66 km).
Data is approximate and courses change between editions - always verify against the official race guide.
Other distances at Gran Trail Courmayeur
Plan against the cutoffs
Prepare every aid station against the official cutoffs, then unlock your full roadbook in the app.
Estimate your finish
One Strava connection reads your last 90 days and estimates your finish on this course. Free, no plan needed.
Course math
Four numbers worked out from this course's distance, elevation and checkpoints.
TrailMath effort-km
106 effort-km
About 11 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
50K
88 km-effort (distance + gain ÷ 100). Calculated from the course figures, not an official classification.
Estimate your UTMB Index → ITRA and UTMB indexes explainedBiggest climb section
+1,567 m+5,141 ft
Courmayeur → Youlaz · km 0–15.1mi 0–9.4
The largest gain between two checkpoints, not one continuous climb.
Biggest descent section
−727 m−2,385 ft
Courmayeur → Youlaz · km 0–15.1mi 0–9.4
The largest loss between two checkpoints. ITRA's km-effort ignores descent; TrailMath counts it: 106 km-effort.
Open in GPX Explorer →Share this race
Cards sized for Instagram and Strava.
Gran Trail Courmayeur - GTC55 · 2026
Finish times, 2026 edition
468 runners started. 456 came back. Half of them took longer than 10:44:53.That left the median finisher 7:15:07 inside the 18h cutoff.
Median finish
10:44:53
Half of the 456 finishers were still out there at this point.
7:15:07in hand before the 18h cutoff
Average 10:43:58, 0:00:55 quicker than the median: a fast front pulls it down.
The start line
97.4%
456 of 468 starters made it; 12 did not.
still moving when a cutoff closed
stopped by choice or by the medics
Organisation stops and disqualifications: 12.
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
10:37:48
median finish; average 10:30:56
347 finishers, 76% of the field
Women
11:41:15
median finish; average 11:25:25
109 finishers, 24% of the field
1:03:27 separates the two medians, across 347 men and 109 women.
Finish time by age group
Every track runs from the start to the 18h 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 |
|---|---|---|---|
| SEN | 10:04:11 | 138 | |
| V1 | 10:46:57 | 90 | |
| V2 | 11:02:47 | 96 | |
| V3 | 11:17:03 | 22 | |
| V4 | - | 1 - too few finishers to publish a time |
| Age | Median finish | Median against the cutoff | Finishers |
|---|---|---|---|
| JUN | 10:17:32 | 3 - small sample, read with care | |
| SEN | 10:24:26 | 44 | |
| V1 | 11:48:19 | 30 | |
| V2 | 12:06:08 | 26 | |
| V3 | 12:04:47 | 6 - 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
60% of the finishers came from Italy alone.
| Nation | Finishers | Share |
|---|---|---|
| ItalyIT | 27460.1% | |
| FranceFR | 5812.7% | |
| BelgiumBE | 204.4% | |
| United KingdomGB | 173.7% | |
| NetherlandsNL | 122.6% | |
| United StatesUS | 92.0% | |
| FinlandFI | 71.5% | |
| IsraelIL | 71.5% | |
| DenmarkDK | 51.1% | |
| SpainES | 51.1% | |
| CanadaCA | 40.9% | |
| HungaryHU | 40.9% | |
| PolandPL | 40.9% | |
| RussiaRU | 40.9% | |
| GermanyDE | 30.7% | |
| LithuaniaLT | 30.7% | |
| SloveniaSI | 30.7% | |
| AustraliaAU | 20.4% | |
| SwedenSE | 20.4% | |
| ArgentinaAR | 10.2% | |
| ChinaCN | 10.2% | |
| CzechiaCZ | 10.2% | |
| GreeceGR | 10.2% | |
| IrelandIE | 10.2% | |
| JapanJP | 10.2% | |
| LatviaLV | 10.2% | |
| MaltaMT | 10.2% | |
| MexicoMX | 10.2% | |
| New ZealandNZ | 10.2% | |
| RomaniaRO | 10.2% | |
| VietnamVN | 10.2% | |
| South AfricaZA | 10.2% | |
| 22 other nations12 other nations2 other nations | 429.2%122.6%20.4% |
Showing 20 of 32 nations.Showing 30 of 32 nations.Showing 32 of 32 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, verifiedNovember 4, 2026 - Official results
Ask the course
Ask GTC55 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?
Courmayeur to Youlaz: +1,567 m over 15.1 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?
Youlaz, km 15.12 - the first of 4 crew points. The next is Mont Fortin, km 24.65. Have them bring warm layers: the course tops out at 2,830 m, in July.
Is 10h a realistic finish for me?
10h would put you in the faster half of 2026 finishers - the median was 10:44:53. It means holding 11:15/km overall.
The assistant answers that once it can see your training.
Build your GTC55 plan and your question is the first thing waiting in the TrailMath Assistant.
Build my GTC55 planYearly has a 7-day free trial for eligible customers, or take a Race Pass for this race.
To answer this for you, the Course Assistant uses your training and your race plan.
Example answer
Your long runs peak at 15 km, so the plan builds to 4-hour long runs.
Yearly has a 7-day free trial for eligible customers, or take a Race Pass for this race.
Try asking GTC55
Ask anything - we'll open your GTC55 plan with your question ready.
Loading the Course Assistant
See your training shape
Pick your weekly volume and training days to preview the plan structure - no account needed.
~36 weeks · peak ~8 h/week · 5 run + 2 strength days
For a 53.3 km race, aim for about 8 h/week at peak. Set your availability to 9 h/week in the app for the headroom to build there gradually.
Typical structure for your volume - your live plan adjusts sessions inside each week.
Make this your plan
Create your account to see the full week-by-week plan, then choose how to unlock it.
Aid stations and checkpoints
| Checkpoint | KmMi | Cumulative gain (m)Cumulative gain (ft) | Cumulative loss (m)Cumulative loss (ft) | Cutoff |
|---|---|---|---|---|
| Start - CourmayeurServices not published | 00 | 00 | 00 | - |
| YoulazCrew | 15.129.4 | 1,5675,141 | 7272,385 | Sat 11:00 |
| Mont FortinCrew | 24.6515.3 | 2,6888,819 | 1,1023,615 | - |
| Casermetta (Val Veny) | 32.420.1 | 2,8859,465 | 1,7055,594 | - |
| Lago CombalCrew | 36.122.4 | 2,8859,465 | 2,1096,919 | Sat 17:00 |
| Rifugio Maison VieilleCrew | 44.6627.8 | 3,40211,161 | 2,6418,665 | - |
| Brenva | 49.1830.6 | 3,44311,296 | 3,28110,764 | - |
| Courmayeur (Finish)Crew | 53.333.1 | 3,50011,483 | 3,50511,499 | Sun 01:00 |
Data is approximate and courses change between editions - always verify against the official race guide. Source: official race guide, verifiedNovember 4, 2026 - Official race website
FAQ
How much elevation gain does Gran Trail Courmayeur - GTC55 have?
Gran Trail Courmayeur - GTC55 has around 3,500 m of cumulative elevation gain and 3,505 m of loss over 53.3 km.
What is the cutoff time for Gran Trail Courmayeur - GTC55?
The overall Gran Trail Courmayeur - GTC55 cutoff is 18 hours, with intermediate time barriers at major checkpoints. Winning times are typically around 5 hours.
How long is Gran Trail Courmayeur - GTC55?
Gran Trail Courmayeur - GTC55 covers approximately 53.3 km, starting in Courmayeur, Valle d'Aosta, Italy.
What is the highest point of Gran Trail Courmayeur - GTC55?
The highest point of Gran Trail Courmayeur - GTC55 is Mont Nix at 2,830 m.
How many aid stations does Gran Trail Courmayeur - GTC55 have and which allow crew?
The checkpoint table lists 6 major aid points between the start and the finish. Crew access is allowed at Youlaz (15.12 km), Mont Fortin (24.65 km), Lago Combal (36.1 km) and Rifugio Maison Vieille (44.66 km).
Training for this race?
TrailMath builds periodized trail training plans around your goal race.
One Strava connection reads your last 90 days and estimates your finish on this course. Free, no plan needed.