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Arête des Cosmiques rock climbing and portaledge, Chamonix | undefined

Arête des Cosmiques rock climbing and portaledge, Chamonix

A unique climbing program in the Arête des Cosmiques in Chamonix, spending a night on a portaledge, along with Mathis, an aspirant mountain guide. Enjoy the best views of the Mont Blanc Massif!




2 Days


Jun - Sep






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I invite you to a unique rock climbing experience in a spectacular scenery. Join me for a 2-day guided rock climb in the Arête des Cosmiques and spend a night in a portaledge!

If you have a good head for heights and a brave spirit, an overnight hanging from the rock is something you have to experience!

It might sound risky, but I assure you sleeping on a portaledge is very safe. It's such a unique feeling, sleeping there with no one around, just us and the mountains. And from the Cosmiques Ridge, we will be able to enjoy a magnificent view of Mont Blanc.

The Arête des Cosmiques, also called Cosmiques Ridge, is one of the most popular routes in the impressive Mont Blanc Massif. It has a few challenging sections, but it is not too difficult. It has varied routes that offer a great diversity of climbing options. Also, it's really exposed and offers amazing views. 

In the program I propose I offer you the option of just sleeping there: going down from the top and installing the portaledge not far from the top, or in the middle of the wall. Or we have the option of climbing up from the bottom of the wall and sleeping in the midddle. Then, with this option, the day after we would either abseil down or climb up.

Please note it’s possible to join this tour with no climbing experience.

If you want to go somewhere else or if the conditions at Arête des Cosmiques are not good, we can do this same program on the Brévent peak or in Annecy, above the lake. These are also 2 amazing spots for this great climbing adventure.

So if you want to be part of this unique experience, just send me a request! We will start planning this adventure in the  Arête des Cosmiques right away.

Price includes

- Accommodation included

- Guiding fee

Price details

The price does not include the guide´s expenses (accommodation, meals, lift tickets, etc).

Secure your spot with just 25% payment

48-hour free cancellation with 30-day advance booking


More info

I provide you with all the equipment. You need to bring a sleeping bag. I can take a maximum of 4 people with me, with 1 portaledge every 2 people and my own portaledge.

If you want a full day of climbing on Day 2, starting from the bottom on Day 1, the price per person is the following:

1 person: 800€ Group of 2: 400€ Group of 3: 270€ Group of 2: 200€

Meeting point


About the guide: E-S Adventure Guides

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E-S Adventure Guides



Mountain Guide

Gauthier and his team of IFMGA/UIMLA-certified mountain guides & leaders and rock climbing instructors (Anabelle, Andrea, Andrej, Claire, Christophe, Daniel, Elis, Enrico, Etienne, François, Guillaume, Ivan, Jessy, Julia, Mathis, Mitja, Olivier, and Robin) are some of the top outdoor adventure professionals in Europe.

Whether you wish to climb some of the best mountains in the Alps or go on an exciting bouldering adventure in Fontainbleau, among other amazing options, they will be able to show you the top spots and the ropes to ensure you have an unforgettable and safe adventure.

Gauthier will be your main point of contact during the booking process and will be able to help you with all the questions you have in order to make sure you receive the best possible guiding service.

Pick one of the programs featured for E-S Adventure Guides and start planning an awe-inspiring experience in the mountains!


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What people are saying about E-S Adventure Guides



Great Experience and would hire again in a heart beat!



Excellent accompagnement, aussi bien avant la journée par mail, que le jour même. Yvan nous a amené à un site magnifique, et a prodigué d'excellents conseils à mon fils. Nous avons passé une excellente journée



Super ! Nous avons passé une excellente après-midi avec Willy ! Nous avons eu des conseils et des recommandations pour pouvoir continuer la pratique de via ferrata. Je recommande vivement cette expérience



We had a very exciting day with Willy! We had never done a via ferrata before and did Pont-a-Lesse and Marche-les-Dames in one day. Willy explained the different techniques very well and adapted to our wishes and the circumstances perfectly. Gauthier adviced us in the beginning correctly that Marche-les-Dames would be better for us than Les-Grandes-Malades in terms of difficulty. Overall we were very happy with the choice, spend a great day outdoors and can definitely recommend this adventure!



We had a really fantastic day of bouldering in Fontainebleau with our guide Ivan. He is very experienced and knows the region well. He showed us great boulders and routes that we would not have found on our own, and kept a good pace to keep us going for the full six hours.

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