Trail Surprise is the 12.4km trail race at Eiger Ultra Trail by UTMB 2026 (Grindelwald, Switzerland). The race starts on July 17, 2026 at 12:30 PM. It starts in Grindelwald. The time limit is 4 h.
Short race: go all out.
The course climbs 794m+. With 64m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 39% of the distance is uphill, 39% downhill and 22% flat. The longest climb runs 6.6km at an average 9.7% grade (636m of vertical). The longest descent runs 5.5km at an average 12.1% grade (666m of vertical). The steepest climb averages 34.9% over 0.9km. The steepest descent drops at 26.8% over 0.3km. Surface: 52% road, 40% trail, and 6% smooth. Flat-equivalent effort: 17.1 FlatKM.
Poles bring little benefit here: only about 1.7km of pole-friendly terrain.
Quad damage risk is low (index 12 of 100): a few descents worth noting, none of them decisive.
On race day, start temperatures have historically ranged from 17°C to 26°C, with around 20°C at the highest point; the chance of precipitation is about 56%. Heavy rain of 10.0mm or more falls on about 10% of days around this date.
250 finishers completed the 2026 edition. Men's winner: Mario-Gottfried Moratto (Switzerland) in 1:04:01. Women's winner: Marjolaine Newbery (Australia) in 1:20:33.
This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Trail Surprise.
Other distances of Eiger Ultra Trail by UTMB 2026E250 - UNESCO Trail (250km)·E101 Ultra Trail (101km)·E51 Panorama Trail (51.0km)·E35 - North Face Trail (35.0km)·E16 - Pleasure Trail (16.0km)
Other editions of Trail Surprise2025
Official websiteeiger.utmb.world