In 2025, Klättermusen joins us as the presenting partner for the Sörmlands 50K. They’ve been making durable, responsibly built gear in Sweden for 50 years, and it just fits. Like us, they care about the outdoors, doing things the right way, and building a community around shared values. This isn’t about hype — it’s about showing up, being part of something real, and supporting the people who make trail running what it is.