About This Race
The Eiger Ultra Trail by UTMB 35K runs through the UNESCO World Heritage site of the Jungfrau region, where runners traverse trails beneath the iconic north face of the Eiger. Part of the UTMB World Series, this mid-distance event attracts runners seeking a serious alpine challenge without committing to ultra distances. The course draws from the same trail network that has defined Swiss mountain running for generations, offering access to high-alpine terrain that would otherwise require technical mountaineering skills. Grindelwald serves as both start and finish, a village that has anchored alpinism since the golden age of mountain exploration. The race typically runs in mid-July when snowmelt opens the higher passes and alpine meadows reach peak bloom. Runners can expect technical descents, sustained climbs through forests and alpine pasture, and the kind of weather variability that defines mountain racing at elevation. The 35K distance sits in the middle of the Eiger Ultra Trail weekend, sharing the course with shorter and longer events. This makes it suitable for runners building toward 50K or 100K distances, or for experienced mountain runners who want a focused effort in world-class terrain. The UTMB World Series designation means competitive fields and well-supported aid stations, though the mountains themselves remain the primary challenge.
The course departs Grindelwald and climbs through mixed forest before emerging into alpine pasture with views across the Lauterbrunnen valley. Runners traverse high trails beneath the Eiger's north wall, passing through terrain where rock, grass, and snow meet. Technical sections alternate with runnable alpine track, demanding both climbing fitness and descent control. The route returns to Grindelwald through different valleys than the ascent, completing a loop that showcases the region's varied alpine environments.
Location
Practical Info
Mid-July alpine conditions range from warm sunshine to sudden afternoon thunderstorms. Expect temperatures from 10-25°C (50-77°F) at lower elevations, cooler at higher passes. Afternoon clouds and storms are common in the Swiss Alps.
ZUR - Zurich Airport
Grindelwald offers extensive accommodation from budget hostels to luxury hotels, though booking well in advance is essential during the race weekend. The village is accessible by train from Interlaken, and Swiss public transport reaches most lodging options directly.
Best For
Notable Features
Running beneath the Eiger's north face places runners in terrain that holds deep significance in mountaineering history. The UNESCO World Heritage designation reflects the geological and cultural importance of the Jungfrau region. As part of the UTMB World Series, the race draws an international field and offers qualifying points for UTMB Mont-Blanc. The course infrastructure benefits from Switzerland's long tradition of mountain trail maintenance, with well-marked paths and established alpine hut systems.