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Eiger Ultra Trail by UTMB
250km250101km10151km5135km3516km1612.4km12.4

Trail Surprise

UTMB World Series
12.4km·794m+
July 17, 12:30 PM
Grindelwald,
Switzerland
itra·utmb·source

Race Pace Calculator · GPX Analyzer · Trail Finder

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Read

  • How to Taper for a Marathon, Half Marathon or Ultra
  • Types of Runs and What Each Workout Actually Trains
Hill Training for Trail Runners: Train the Descents

Full calendar: Switzerland

Trail Surprise · Race profile

Distance
12.4km
Gain
794m+
FlatKM
17.1
Max
1604m
Min
1036m

About Trail Surprise

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.

Race strategy

Short race: go all out.

  • Steep 35% wall. Control your pace and stay focused.
  • Hold your race pace up to 6.6km, but stay in control.
  • Control your HR on the first mountain, and start the final descent from 6.6km under control, then go all out near the bottom.
  • Start · 0.0km–2.2km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Work · 2.2km–6.6km · Climb of 636m, high point 1604m. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace. Hike the steepest pitches.
  • Home · 6.6km–12.1km · Descent of 666m averaging 12%. Kick for the line: give it everything you've got. Very long descent: first half under control, then even, let go only near the end.

Course

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

Poles bring little benefit here: only about 1.7km of pole-friendly terrain.

Quad damage

Quad damage risk is low (index 12 of 100): a few descents worth noting, none of them decisive.

  • Control your HR on the first mountain, and start the final descent from 6.6km under control, then go all out near the bottom.
  • 6.6–12.1 km · 666 m D−, -12.1% · 0.0 km ahead → even, first half under control, let go at the end

Weather

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.

Results

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