Course guide · 2026

UTMB Mont-Blanc CCC 2026: the course by the numbers

By Guglielmo Published · Organiser's figures checked

The CCC is 101.4 km with ↑ 6,015 m of climbing, from Courmayeur to Chamonix: 143 flat-equivalent km. No single climb dominates; the biggest is ↑ 730 m in 3.8 km from Trient to Les Tseppes, steep. Grand Col Ferret, 2,528 m, is the high point.

Race day was Friday, 28 August 2026, start at 09:00 in Courmayeur; time limit 28:00. These are that edition's figures, the latest on the organiser's site on 18 Oct 2026. Part of HOKA UTMB Mont-Blanc, 24 – 30 August 2026, Chamonix Mont-Blanc, France.

Course facts · 2026

Distance
101.4 kmOrganiser
Gain
↑ 6,015 mOrganiser
Loss
↓ 6,199 mOrganiser
D+ per km
59 mOrganiser's figures
Flat-equivalent
143.2 kmPendio, from the GPX
High point
2,528 mPendio, from the GPX

Header: 108 km and 6,200 m; course table: 101.4 km and 6,015 m; this page uses the table. Some cut-offs on the page belong to another edition with a different timetable; they are left out and the time limit kept.

Elevation · CCC peak 2,528 m
0 km99.4 km
Hardest climb3.8 km @ +19.3 %
Hardest descent3.4 km @ −15.3 %
Distance
99.4 km
Gain
↑ 6,017 m
Loss
↓ 6,203 m
Peak
2,528 m

The GPX's own numbers, a little under the organiser's figures. The organiser's file jumps 20 m in 23 m at km 45.0, which the profile shows.

Where is the CCC decided?

From Trient to La Flégère: the climb over Les Tseppes and the climb up from Vallorcine, late in the race.

The climb out of Trient to Les Tseppes is the biggest of the course, 730 m in 3.8 km, and steep. It drops steeply to Vallorcine, and the next leg climbs again, past the Col des Montets and Tête de Béchar, nearly 1,000 m in all up to La Flégère. These two legs come back to back, with 70 % of the effort already behind you. Kilometre for kilometre they are the hardest of the race after the first. At the time-limit pace you start the climb out of Trient at twenty to five on Saturday morning and reach La Flégère late in the morning.

Before that comes the night. Half the effort is done by Champex-Lac, which you reach at twenty past midnight at the time-limit pace. The longest leg of the course follows: 16.5 km over the climb to La Giete and down to Trient, all of it in the small hours.

After La Flégère the race is downhill to the end. The last leg drops 859 m in 7.2 km, with almost no climbing. It opens with the biggest descent of the course, and the drop into Chamonix after it is steep too. Kilometre for kilometre it is the easiest leg of the race, and the only one that is nearly all descent.

The single hardest leg is the first. From Courmayeur to Refuge Bertone the course climbs 1,436 m in 13.7 km, over two big climbs. The one straight out of Courmayeur is steep, and the one to Tête de la Tronche is very steep, the steepest of the course’s big climbs. Kilometre for kilometre that leg is more than a quarter harder than the average, and it holds about a sixth of the whole effort. At the time-limit pace you reach the refuge at ten to two on Friday afternoon.

Organiser's distances and heights; Pendio's shares and clock.

Where does the CCC's effort go, aid station by aid station?

Organiser: km, ↑, ↓ and supplies (2026). Pendio: the shares. How we measure courses.
Legkm ↑ m↓ m DistanceEffort
→ Refuge Bertonekm 13.7 · food 13.7 1,436677 14 % 17.3 %
→ Arnouvazkm 26.5 · food 12.8 472679 13 % 10.5 %
→ La Foulykm 40.9 · food 14.4 8661,036 14 % 14.5 %
→ Champex-Lackm 55.2 · food 14.3 599727 14 % 12.3 %
→ Trientkm 71.7 · food 16.5 8461,018 16 % 15.7 %
→ Vallorcinekm 82.9 · food 11.2 808852 11 % 12.2 %
→ La Flégèrekm 94.2 · drink 11.3 967351 11 % 12.5 %
→ Chamonixfinish · km 101.4 7.2 21859 7 % 5.0 %

The course in detail

Flat-equivalent distance

143.2 km for 99.4 km on the map

Terrain

Climbing 43 %Flat 6 %Descending 51 %

Distance in each grade band
GradeDistanceShare
≤ −20 %9.3 km9.3 %
−20 / −15 %6.3 km6.3 %
−15 / −10 %9.6 km9.7 %
−10 / −6 %10.1 km10.1 %
−6 / −3 %9.2 km9.3 %
−3 / −1 %6.2 km6.3 %
−1 / +1 %5.6 km5.6 %
+1 / +3 %5.0 km5.1 %
+3 / +6 %6.9 km6.9 %
+6 / +10 %7.7 km7.8 %
+10 / +15 %6.8 km6.8 %
+15 / +20 %6.0 km6.1 %
> +20 %10.6 km10.7 %

D+ per 10 km

0–10 km1,432 m
10–20 km270 m
20–30 km982 m
30–40 km146 m
40–50 km136 m
50–60 km639 m
60–70 km702 m
70–80 km816 m
80–90 km638 m
90–99.4 km380 m

Biggest climbs

From (km)Length (km)D+ (m)AverageSteepest 100 m
71.03.8730+19.3 %+46.8 %
27.33.0572+18.9 %+39.8 %
7.12.0554+28.3 %+44.4 %
3.22.9509+17.7 %+36.9 %
61.42.5386+15.3 %+36.3 %

Biggest descents

From (km)Length (km)D− (m)AverageSteepest 100 m
92.33.4523−15.3 %−33.6 %
30.33.8474−12.4 %−24.9 %
78.52.2393−17.7 %−32.8 %
64.32.5330−13.3 %−31.6 %
96.22.3292−12.7 %−39.3 %

How does it compare?

Organiser: km and ↑. Pendio: the rest. Every course side by side.
Coursekm↑ mD+ per kmFlat-equivalentSteeper than ±10 %
OCC 61.23,34255 m83.2 km43 %
E101 - Ultra Trail 100.76,39163 m146.6 km56 %
CCC 101.46,01559 m143.2 km49 %
Ultra Trail Chianti Castles 124.04,81039 m146.1 km32 %
UTMB 176.810,00057 m247.0 km49 %

Plan your CCC

Your target time, shared out by effort between Refuge Bertone, Arnouvaz, La Fouly and four more aid stations, with your clock at each one against the 28:00 time limit at the finish in Chamonix, the fueling plan and a pace card.

The course and its GPX on the organiser's site ↗ Add to Pendio

Adds the CCC 2026 course to your Pendio account, with its aid stations as a race plan. Your phone or browser downloads the file from the organiser's own site, and Pendio checks it against the file this page measured.

Questions

How long is the CCC?

101.4 km, ↑ 6,015 m and ↓ 6,199 m, from Courmayeur to Chamonix (the organiser's 2026 figures); their GPX measures 99.4 km and ↑ 6,017 m.

How much of the CCC is flat?

Almost none: 6 % of the CCC is flat, about 6 km; 43 % climbs and 51 % descends.

What is the CCC time limit?

28:00 from the 09:00 start, so the finish in Chamonix closes at 13:00, day 2; the organiser's page lists another edition's cut-offs only, so none is given before the finish.

What is the biggest climb on the CCC?

↑ 730 m in 3.8 km from Trient to Les Tseppes, steep: 19 % on average, 47 % over its steepest 100 m.