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Cosmiques Ridge

Amazing Chamonix Classic climb, ideal introduction to mixed climbing. It is possible to climb the ridge year round depending on snow conditions.


The Cosmiques Arete is a spectacular climb that starts and ends at the Aiguille du Midi. It is understandably one of the most popular alpine routes in the Chamonix Valley and is an unmissable experience for any climber.

The Cosmiques ridge offers varied climbing on snow, rock and ice – it is not too difficult but remains interesting. Stepping out through the ice tunnel at the top of the Aiguille du Midi, you will traverse an extremely exposed ridgeline with breathtaking views in all directions. There are some challenging sections but all are short and anyone with previous climbing experience should not find them to be too much trouble.

Climbing the Arete des Cosmiques is a fantastic day in one of the most spectacular parts of the Mont Blanc Massif – you’ll cross glacial terrain, climb up granite slabs and scale icy couloirs surrounded by towering peaks. The Cosmiques Ridge is a superb varied route which is doable by relative beginners to Alpine climbing, yet is interesting enough to satisfy experienced climbers.

It is possible to climb the ridge year round depending on snow conditions; the most popular time of year to climb the Cosmiques Arete is between June and September.

If you would like to gain some experience before climbing the Arete des Cosmiques we recommend that you take part in either our Chamonix Granite Climbing Weekend or our Introduction to Alpine Climbing Week. Alternatively, you can book a private mountain guide for personal tuition for as many days as you like.

Climbing the Cosmiques Ridge takes about half a day, you will start early in the morning and finish early in the afternoon. We take the Aiguille du Midi cable car up to the summit and then start the approach, which is a short 20-30 minute glacier hike; the route finishes back at the Aiguille du Midi lift station from where we will return to Chamonix.

Technical Information:

  • Difficulty rating: AD, 4a (4c crux)
  • Elevation min/max: 3550 m / 3842 m
  • Height difference: +300 m / -300 m
  • Difficulties height difference: 240 m
  • Difficulties start altitude: 3600 m

From: 550 €


  • Dates on demand
  • Guiding ratio 1:2
  • 1 day climb
  • Available year round
  • Private trips only
Mountaineering boots
Windproof and waterproof jacket
Thin gloves
Warm hat
Fleece or woollen layers
Light puffer jacket
Warm gloves
Thermal underwear
Windproof and waterproof trousers
Climbing pants
Technical gear
Ice axe
Technical gear
Climbing helmet
Technical gear
Technical gear
25 – 30 litres rucksack
Technical gear
Climbing harness
Technical gear
Screwgate carabiner x3
Other essentials
Other essentials
Water bottle – Ideally two 1L bottles
Other essentials
Sun cream high protection (for lips and face)
Included in price

Guide Fee

UIAGM / IFMGA mountain guide – a fully qualified and experienced Chamex guide will accompany you for the duration of your trip.

Group Equipment

Ropes, safety equipment, etc will be provided when needed by your guide.

Office Support

Our team is based at the foot of the Aiguillle du Midi cable car and will be happy to help you with any questions you may have before, during or after your trip to Chamonix.

Not included in price

Personal Equipment

Please see the “Equipment” tab to find out what you will need on this trip / course.  For private customised guiding, please contact us directly to confirm your personalised kit list.


Travel insurance including a mountain search and rescue insurance is mandatory on all our trips (we can organise the mountai search and rescue insurance for you on request). We highly advice to have a policy covering the cost of medical treatment and to protect the value of your holiday in the event of cancellation. When taking out insurance please ensure the policy you choose covers you for the activities and altitude included in your itinerary.

Food & Drink

The price does not include lunch or snacks. You can bring your own food and we can stop for a picnic, or there may be the option to buy lunch at a mountain hut. Please make sure that you are carrying sufficient water and snacks as we will be in the mountains for a number of hours.

Lift Passes

We will advise you on which lift passes you will need prior to your trip. If lift passes are required we can preorder them for you on request.

Accommodation in Chamonix

Accommodation in Chamonix is not included in the price but we would be happy to advise or organise it on request.

Travel to Chamonix

The price does not include flights, airport transfers or any other travel to/from Chamonix. However, we can organise airport transfers for you on request, please contact us for details.