The route
165.7 km from the Grande Dixence dam to Lake Geneva, highest point by km 5.5, with 10,701 m of climbing.
Drawn with a pen, line by line
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Indicative figures computed by Plotrek on its illustrative route, with altitudes from a terrain model. They may differ from the organiser's.
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The longest route in this batch of posters starts at an alpine dam and finishes on Lake Geneva, with its highest elevation crossed very early on.
10 am: the gun goes off at the Grande Dixence, a large Valais dam. The route climbs straight to that high point, then settles into a very long string of mountain passes.
It then crosses the Col de Mille, then the Fenêtre d'Arpette, on the route's longest climb, before the Col de Susanfe and the Portes de l'Hiver.
The route also crosses the Col de Folière and the Pas de Lovenex, before dropping to Le Bouveret, on the shore of Lake Geneva. 56 hours: the widest cutoff in this batch of races.
Paths and places: © OpenStreetMap contributors. Altitudes measured on the route.
03 · Your poster
The relief of the course, from the Grande Dixence dam to Lake Geneva, takes shape as contour lines: our pen plotter draws it with a pen, line by line. Your finisher name and time go in the title block, in A4, A3 or A2.
Shipped from our workshop in Le Bouscat
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Updated Route and text: Plotrek workshop (Fabrice Jolivet)
The organiser announces 168 km and 10,990 m of elevation gain for the 2026 edition. Plotrek's illustrative route, redrawn on OpenStreetMap paths, measures 165.7 km and 10,701 m of gain. Start: Barrage de la Grande Dixence; finish: Le Bouveret; on the way, Col de Susanfe at km 91.5.
56 hours for the 2026 edition, according to the organiser's website, read on 17 September 2026. That is the time allowed to cover the announced 168 km. Start: Barrage de la Grande Dixence, at 10 am. The time limit can change from one edition to the next; the organiser's rules prevail.
Col de Prafleuri, at 2,958 m, at km 5.5 of Plotrek's route. The high point lies between two landmarks of the course: Barrage de la Grande Dixence (2,311 m, km 0) and Col de Mille (2,468 m, km 32.5). The start is at 2,311 m, the finish at 371 m.
1,715 m of elevation gain in one go, from km 43.9 to km 57.4 of Plotrek's route. Landmark on the way: Fenêtre d'Arpette (2,619 m, km 57.4). No other climb on the 165.7 km course is as long. Average gradient of this section: 12.7%. It accounts for 16% of the route's elevation gain.
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Other races in the same spirit