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HOKA UTMB Mont-Blanc
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ETC

UTMB World Series
15.0km·700m+
August 31
Chamonix,
France
utmb·source

Race Pace Calculator · GPX Analyzer · Trail Finder

Other races: France

Read

  • Types of Runs and What Each Workout Actually Trains
  • Hill Training for Trail Runners: Train the Descents
  • Downhill Running Muscle Damage: Why Descents Wreck Quads

Full calendar: France

ETC · Race profile

Distance
15.0km
Gain
700m+
FlatKM
26.2
Max
1966m
Min
1223m

About ETC

ETC is the 15.0km trail race at HOKA UTMB Mont-Blanc 2025 (Chamonix, France). The race starts on August 31, 2025.

Race strategy

Hold a steady pace and save energy for every section.

  • Start easy and control your HR up to 7.0km.
  • Steep 31% wall. Control your pace and stay focused.
  • Hold your race pace up to 12.9km, but stay in control.
  • Control your HR on the first mountain, then run your race pace, and go all out on the final descent from 12.9km.
  • Start · 0.0km–1.6km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Settle in · 1.6km–7.0km · Climb of 825m, high point 1966m. Plus 1 more descent. Ease in: hold back more than feels necessary. The race is still ahead. Climb by heart rate or breathing, not pace. Hike the steepest pitches.
  • Work · 7.0km–12.9km · Plus 2 more climbs and 1 descent. This is where the race is built: steady, solid effort. Climb by heart rate or breathing, not pace. Hike the steepest pitches.
  • Home · 12.9km–14.5km · Descent of 170m averaging 11%. Build to the finish: leave whatever you have left out on the course.

Course

The course climbs 700m+. With 47m/km of climbing, this is a true mountain course with sustained climbs and descents. By gradient, 44% of the distance is uphill, 53% downhill and 3% flat. The longest climb runs 5.7km at an average 14.5% grade (825m of vertical). The longest descent runs 4.5km at an average 16.1% grade (719m of vertical). The steepest climb averages 31.3% over 0.5km. The steepest descent drops at 30.3% over 0.4km. Surface: 70% trail, 14% technical, and 13% road. Flat-equivalent effort: 26.2 FlatKM.

Poles

Trekking poles are strongly recommended: about 4.4km of the course is steep enough for them to pay off.

Quad damage

Quad damage risk is low (index 18 of 100): a few descents worth noting, none of them decisive.

  • Control your HR on the first mountain, then run your race pace, and go all out on the final descent from 12.9km.
  • 7.8–12.3 km · 719 m D−, -16.1% · 2.2 km ahead → your pace

Weather

On race day, start temperatures have historically ranged from 9°C to 19°C, with around 12°C at the highest point; the chance of precipitation is about 42%.

Results

1,283 finishers completed the 2025 edition. Men's winner: Alain Santamaria Blanco (Spain) in 1:21:07. Women's winner: Madalina Florea (Romania) in 1:30:55.

This page has the full results and splits, a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for ETC.

Other distances of HOKA UTMB Mont-Blanc 2025UTMB (176km)·TDS (153km)·CCC (101km)·OCC (57.0km)·MCC (40.0km)·YCC (15.0km)

Other editions of ETC2026

Official websitemontblanc.utmb.world