IMPORTANT COURSE CHANGE NOTICE: The small Hellerbrigga bridge between the Grengiols and Mühlebach aid stations is damaged and closed. For this reason, all runners in the 100 km and 160 km categories will have to take a short detour to bypass this bridge. This detour adds 1.7 km to the distance and 87 metres to the elevation gain. However, none of the aid station or finish line cut-off times will change. The downloadable GPX files below reflect this change.

Are you ready for the challenge of a lifetime? The Swiss Alps 100 100KM course is an awe-inspiring journey through some of the most breathtaking landscapes on Earth. With a staggering 6'250 meters of elevation gain, this course is not for the faint of heart—but for those who dare, it delivers an unforgettable adventure.

Your journey begins in the heart of the Oberwallis region, winding through high-alpine trails, lush meadows, and rugged mountain passes. Along the way, you'll be treated to jaw-dropping views of the UNESCO World Heritage Aletsch Glacier , the largest glacier in the Alps, stretching over 23 kilometers in length. As you push through the grueling ascents and thrilling descents, you'll cross two iconic suspension bridges—the Aspi-Titter Bridge , spanning 160 meters over a deep gorge, and the Mühlebach-Fürgangen Bridge , a whopping 280 meters long. Each step across these engineering marvels will leave you breathless (if the altitude hasn't already!).

With 10 fully stocked aid stations, you'll be well-supported as you navigate this demanding yet rewarding course. The 27-hour cutoff ensures that determined runners have the time to conquer the challenge, but if you finish in 22 hours or less, you’ll earn the distinction of being an official qualifier for the Western States 100, the oldest 100-mile race in the United States!

Every finisher will proudly receive a stunning 9cm (3.5-inch) medal, a symbol of their grit and perseverance. Additionally, we recognize the top runners in their divisions with male and female age group awards (18-29, 30-39, 40-49, 50-59, 60-69, 70+), celebrating the strength and endurance of runners of all generations.

This is more than just a race—it’s a test of resilience, an adventure through the Swiss Alps, and a chance to etch your name among the legends of ultra-running. Do you have what it takes to conquer the Swiss Alps 100 100KM?

Register now and take on the ultimate mountain challenge!