raceindex.org
Explore
Explore RaceIndex

Find your race. Make your plan.

Find a race

Choose your distance and destination.

Compare courses

See what changes from race to race.

Enter and prepare

Turn your choice into a race plan.

Race weekend

Plan travel, support and the finish.

Your next goal

Find a race that fits your experience.

Find a race
Compare courses
Enter and prepare
Race weekend
Your next goal
My Season Save races, keep preparation tasks and plan what comes next.
About RaceIndexOur methodologyData coverageCyclingTriathlon

Marathon du Mont-Blanc, Chamonix

  • Chamonix-Mont-Blanc
  • France
  • Rural
Data current as of

Official event website ↗

Same event — which distance suits you?

DistanceAscentClimb densityDescentNet elevationMax absolute gradeGAP factor
UltramarathonUnavailableUnavailableUnavailableUnavailableUnavailableUnavailable
MarathonUnavailableUnavailableUnavailableUnavailableUnavailableUnavailable
Other1,641 m71.3 m/km634 m1,007 m35.0%40.3%
10KUnavailableUnavailableUnavailableUnavailableUnavailableUnavailable

Ultramarathon

Ascent
Unavailable
Climb density
Unavailable
Descent
Unavailable
Net elevation
Unavailable
Max absolute grade
Unavailable
GAP factor
Unavailable

Marathon

Ascent
Unavailable
Climb density
Unavailable
Descent
Unavailable
Net elevation
Unavailable
Max absolute grade
Unavailable
GAP factor
Unavailable

Other

Ascent
1,641 m
Climb density
71.3 m/km
Descent
634 m
Net elevation
1,007 m
Max absolute grade
35.0%
GAP factor
40.3%

10K

Ascent
Unavailable
Climb density
Unavailable
Descent
Unavailable
Net elevation
Unavailable
Max absolute grade
Unavailable
GAP factor
Unavailable

GAP is modelled energy-cost change versus flat, not a time penalty. Unavailable cells mean no sourced value is available yet. Click a distance for its full page.

Compare distances at this event

Same-event questions

What distances does Marathon du Mont-Blanc, Chamonix offer?

Marathon du Mont-Blanc, Chamonix offers Ultramarathon, Marathon, Other, 10K, all run from the same event.

Typical conditions on race weekend

  • 17°CTypical temperature
  • 7 kphTypical wind
  • 4 mmTypical rainfall
  • 67Favourability /100
Typical conditions for the race date and locality, warmer than the endurance-optimal window. These are climatological norms, not a forecast, and are shared across every distance at this event.

Explore each distance

How we calculated this

Published facts and derived model outputs on this page are tied to stored sources or a published, version-locked methodology. We show the provenance so runners, coaches and organisers can check it. Data on this page is current as of .

Derived numbers use scoring-methodology-v1.0.

Sources used on this page (3)

Read the full methodology →

Source-backed sections

available route profile, race-day conditions, and source facts are shown on this event page. Sections appear only when their source-backed data is available.