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International School of Mountaineering
Classic Alpine Ascents

International School of Mountaineering

Mountaineering expertise and passion since 1965

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Why Choose ISM?

Our pedigree speaks for itself

Founded in 1965, ISM is a prestigious English speaking climbing and mountaineering school based in Leysin Switzerland. We are by far the longest established provider of Alpine mountaineering courses to English speaking clients and attract clients from all over the world.

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Icefall Climbing 4
Off Piste Skiing 3

Sharing Our Knowledge

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Dave on sighting

On-sighting - Tips and Techniques

Verb - To climb a route that you’ve not climbed before, leading it from bottom to top without resting or…

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Kalymnos 2011 063 PS

Red-Pointing - Tips and techniques

Verb - To climb a route from bottom to top cleanly without any artificial rests such as sitting on the…

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The nuts

New Routes in the Canadian Rockies

Every day’s a road trip, as we thread our way through the beautiful mountains of the Canadian Rockies in search…

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Calum e5 Langdale 2

Climbing Motivation

Some thoughts on motivation and raising your climbing standard.

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DSC04458 2

Which Boots do I need?

Boot and footwear choice represents perhaps the single most important decision of all when considering your mountaineering equipment.

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Kyrgyzstan 8597

Some thoughts on rope choice linked into decision making

So, as a BMG IFMGA Mountain Guide and climber what ropes do I use?

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James Brown Original Route 2

Traditional Climbing on a Single Rope

So, traditional climbing on a single rope - old school or maybe just a modern take on things?

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Kevin Borrowdale

Why We Love British Trad Climbing!

Why we love British trad climbing!

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Kyrgyzstan 2019 5711

The Art of Making Traditional Kyrgyz Bread!

Reflecting on a special day in the Pamir Mountains, Kyrgyzstan 2019

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Testimonials For ISM

The course was excellent, lots of variety and provided me with a good range of skills. Loved reaching the summit of the Weissmeis, for such a nervous and unconfident novice like me, I gained a real sense of achievement from the ascent and the whole week. Huge thanks to Pat.

Jo Clark
Summits & Skills 4000m (Instructional Course)

Summiting Mont Blanc was an important milestone for me which I am grateful to all at ISM. Particularly Terry, who is the ultimate professional never compromising on safety. Max is a pure gem with wonderful guidance and outstanding people skills in abundance.Altogether a brilliant week!

David (2017)
Mont Blanc Ascent

​Hi Eira! It is Maite from Spain again! Just a message to tell you that I spent a wonderful week and that both guides (Paolo and Christian) were superb.

Maite Iriarte
Swiss 4000ers

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