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Mont-Blanc Marathon
42km4223km2310km103.8km3.8

Mont-Blanc KM Vertical

3.8km·1000m+
June 25
Chamonix,
France
utmb·source

Race Pace Calculator · GPX Analyzer · Trail Finder

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Read

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  • Hill Training for Trail Runners: Train the Descents

Full calendar: France

Mont-Blanc KM Vertical · Race profile

Distance
3.8km
Gain
1000m+
Max
2046m
Min
1041m

About Mont-Blanc KM Vertical

Mont-Blanc KM Vertical is the 3.8km vertical kilometre at Mont-Blanc Marathon 2027 (Chamonix, France). The race starts on June 25, 2027.

Race strategy

Short race: go all out.

  • Steep 37% wall. Control your pace and stay focused.
  • Control your HR on the first climb.
  • Start · 0.0km–1.1km · Race-day nerves push your heart rate up: don't follow the crowd, find your own rhythm.
  • Home · 1.1km–3.5km · Climb of 1002m, high point 2046m. Kick for the line: give it everything you've got. Climb by heart rate or breathing, not pace. Hike the steepest pitches.

Course

The course climbs 1000m+. With 263m/km of climbing, the course is exceptionally steep, with long hiking-grade sections. By gradient, 100% of the distance is uphill, 0% downhill and 0% flat. The longest climb runs 3.5km at an average 28.9% grade (1002m of vertical). The steepest climb averages 46.5% over 0.3km. Surface: 64% technical, 22% road, and 12% trail.

Poles

Trekking poles are strongly recommended: about 2.9km of the course is steep enough for them to pay off.

Quad damage

There is too little runnable descent to damage the quads: plan the race around climbing and fuelling.

This page has a pacing and nutrition planner, a gradient matrix, an interactive elevation profile and historical weather for Mont-Blanc KM Vertical.

Other distances of Mont-Blanc Marathon 2027Mont-Blanc 42K (42.0km)·Mont-Blanc 23K (23.0km)·Mont-Blanc 10K (10.0km)

Other editions of Mont-Blanc KM Vertical2026

Official websitewww.marathonmontblanc.fr/en