GTC 55Km - 3800m D+

Distance: 55km
Trailers:   / 500
Elevation gain: 3800m
Time limit: 18h
iTRA points: 3
Mountain points: 8



The route winds along paths in the area between Courmayeur and Pré-Saint-Didier for a total of approximately 55km, mainly along Val Veny, with an elevation gain of 3800 metres.

Starting out from Piazza Abbé Henry in Courmayeur (1250m ASL), it heads towards the Fonti Vittoria then takes the trail leading to Champex di Pré-Saint-Didier.From this thermal resort, the trail follows the path across the walkway over the ravine and through the adventure park, descending towards the entrance to the Plan Praz valley, where a slightly sloping path leads to the first refreshment point at the Youlaz lodges (2047m ASL).

Following a section of the Tor des Géants® in reverse, the trail then passes through Colle dell'Arp (2572m ASL), Colle di Youlaz (2661m ASL), and the highest point of the race below Mont Nix (2830m ASL).

A long section then takes the trail runners up to Colle du Berrio Blanc (2818m ASL) and Mont Fortin (2755m ASL), where there's another refreshment point in a portable hut flown in by helicopter. From here it runs alongside the lakes towards Col Chavanne (2598m ASL), then descends to Col de la Seigne (2510m ASL) and the "casermette" (2290m ASL); the trail then goes around the Pyramides Calcaires (2573m ASL) and there's another refreshment point at the Elisabetta refuge (2197m ASL).

From here the trail follows the Tour du Mont Blanc, passing by Lake Combal (1952m ASL), Arp Vieille (2303m ASL) and Lake Checrouit (2151m ASL), and arriving at the Maison Vieille refuge (1952m ASL), which is the last refreshment point.

It then climbs up to Courba Dzeleuna (2048m ASL), descends again to Plan Checrouit and returns to the finish line at Jardin de l'Ange in Courmayeur.


The maximum time allowed for the race is 18 hours.

The trail is highly technical with considerable differences in altitude, exposed sections and the possibility of snowfields, but is run entirely along classified hiking paths.

Sections on paved roads are kept to a minimum and only on public roads where the route passes through built-up areas.


  • Crossing the ravine along the panoramic walkway

  • The long section between Colle di Youlaz and Col Chavanne

  • The descent from Col de la Seigne to the Elisabetta refuge and Lake Combal, passing by Colle delle Pyramides Calcaires


There are several rescue points and refreshment points along the route. Before leaving a refreshment point, runners must ensure they have enough food and water to last them until the next one. The final refreshment point in Courmayeur will supply hot meals.




PDF icon GTC 55km (Map)6.23 MB

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Valle d'Aosta Trailers SSDrl
Courmayeur - Mont Blanc

11013 Via dello Stadio, 2
Valle d'Aosta - ITALIA

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