From Sörmlands 50K to New Adventures
In 2025, Klättermusen proudly stepped in as Head Partner for the Sörmlands 50K, marking a milestone in our 50th anniversary celebrations. And we’re not stopping there—2026 is all about going further. We’re deepening our commitment to the outdoor community and forging exciting new partnerships to keep the adventure alive.
Klättermusen x The Arctic Triple
We are proud to announce that Klättermusen is stepping in to support the legendary The Arctic Triple, becoming the head partner for Lofoten Ultra-Trail.
We are proud to announce that Klättermusen is stepping in to support the legendary The Arctic Triple, becoming the head partner for Lofoten Ultra-Trail.
In 2026, we continue to deepen our commitment to the trail running community. This time, our path leads north, into one of the most dramatic and awe-inspiring landscapes on earth: the Lofoten Islands. Becoming a partner to Lofoten Ultra- Trail means aligning with a race that embraces raw nature, real challenges, and the unmatched spirit of human endurance.
Our shared values make this partnership a natural fit. Lofoten Ultra-Trail is built on authenticity - an experience shaped entirely by the land, the culture, and the people of Lofoten. At Klättermusen, we believe in doing things with intention, with respect, and with deep care for the environments we move through. Together, we aim to create something meaningful for everyone who chooses to step onto those trails.
The Arctic Triple has always been about delivering the full experience of Lofoten - its rugged beauty, its people, its culture, and its challenges. We want every participant to leave with a memory for a lifetime. Klättermusen shares that drive for authenticity and respect for nature, and their commitment strengthens what we can offer all who take part.
Frank Hagen, Founder, The Arctic Triple
Klättermusen x Sörmlands
We are Becoming the Head Partner for both Sörmlands Winter Trail and Sörmlands 100.
In 2025, Klättermusen entered as the Head Partner for the Sörmlands 50K, as part of our 50th anniversary celebrations. This year, we are proud to announce that we are becoming the Head Partner for both Sörmlands Winter Trail and Sörmlands 100, across all distances.
Our shared mindsets have become the perfect match to take this partnership further. We care deeply about the outdoors, doing things a little differently, and bringing people together. The reasons are simple – it's about showing up, being part of something real, and supporting the people who make trail running what it is.
Join Us For Our Pre-Runs
Road to Sörmlands Winter Trail:
18th December – Intro to Winter Trail Running, 7–9 km Social Run
25th January – Perfect Warm-Up for the Race, 15 km Winter Trail
Road to Sörmlands 100:
19th March – Technique & Forest Flow, 8–10 km
16th April – Gear Testing Session, 8–10 km
10th May – Climbing & Descending Efficiency, 10–12 km
14th June – Long Trail + Fuelling Test, 18 km
28th June – Theme Course Race, Putting Everything Together, 20–30 km Point-to-Point
