top of page
© Alexis Berg - Montreux_©AlexisBerg_9989.jpg


70 KM AND 5’100 M D+

A modern day challenge, starting in a Middle Age stronghold, the beautiful Aigle Castle and its postcard settings nested in the middle of the Vaud, Valais and French Alps.

You will need much bravery and heart to face the first and terrible leg of this 69km long race with 4’900 meters of positive elevation: a 1500m D+ climb through forgotten paths that will get you to join the MXTREME track at the Col d’Argniaules, on your way toward the Grand Chamossaire.

Running up and down the Grand and the Petit Chamossaire, you will need to focus on your steps, and not let yourself get distracted by the breathtaking scenery of the Diablerets in front of you, the Mont-Blanc in the distance and the Lake of Bretaye below you. You will get to the Lake of Chavonnes, and its sleeping dragon and then down to the aid station in Le Sépey.

Those of you who will survive this first part of the journey will head up toward the three Towers of , Famelon, Mayen and Aï overseeing and protecting Leysin. The descent toward Corbeyrier, home to the 2020 winner of the MXTREME, will get you to the well deserved third aid station. Rebuild your strengths before the long journey toward the ridge of Malatraix and its sight over the biggest lake of Western Europe. But don’t fool yourself, you still have to climb up the Rocher de Naye, after the penultimate aid station in Col de Chaude, and only then can you dive toward Montreux, and your thighs will welcome the rest in the last aid station in Hauts de Caux before a last exhuberant run down the canyon of Chauderon.

These are just the headlines. Hold your breath and get ready for more surprises!




Departure: Aigle, Castle, Saturday 10th June, 7:00am
Arrival: Clarens (Montreux), Pierrier Beach, Sunday 11th June, + 26h of running

  • Scratch M/W -> Saturday, 7:30pm

  • Other categories -> Sunday, 10:00am


Distribution of race numbers on Friday from 2pm to 8.30pm in Bex and on Saturday morning in Aigle from 5.30am to 7am


Roc d’Orsay, Le Sépey, Mayen, Luan, Joux Verte, Col de Chaude, les Hauts de Caux


  • Le Sépey: 6h of running

  • Clarens (Montreux): 26h of running


Water reserve (1 litre minimum), waterproof jacket with a hood (10’000 mm/h), headlamp with spare batteries,  personal beaker, survival blanket, whistle, food reserve, long running trousers (leggings or a combination of leggings and long socks allowed), warm long-sleeved shirt (arm sleeves allowed), mobile phone working in Switzerland turned on.


Gloves, spare T-shirt, cap or bandana, sunglasses, sun cream


Participants may drop off their personal belongings at the start in Aigle on Saturday morning, and pick them up upon arrival at the finish line in Clarens (Montreux).
The organizer declines any responsibility in case of loss, damage or theft of any valuable item


On Saturday morning, participants can leave their car in Villeneuve (for free), and a bus will take them to Aigle. The bus can also be taken in Montreux, at the Market Place (public bus stop).

The timetables will be communicated shortly before the race day.

Attention : After your arrival in Montreux, you can get back to the parking using the public bus, line 201, and your bib will a valid transportation document. During the night, we will organize the necessary transportation There is no transportation back to Aigle. You can find more details here.


★ ★ ★ A wonderful first experience of long distance trail and a challenging race for runners accustomed to half-marathon or marathon distances (Qualifier UTMB 100K).


09.01.2023 - 15.05.2023   
16.05.2023 - 07.06.2023

Race day (until one hour before the race start)                          

100 CHF
105 CHF

110 CHF                             

bottom of page