3rd July 2021


08:00 pm


20 km

Difference in height

1400 m +/-

ITRA Points

1 ITRA Points



Come to discover the special atmosphere of a night race whose team spirit and sharing will be the watchwords.

You will leave the race with stars in your eyes...

To participate to this race, it’s recommended to have a good mountain race experience, to be comfortable in any ground and to be autonomous for several hours. We draw your attention to the fact that a runner with no ITRA cotation higher than 240 points (check your odds) has very little chance to finish the race. In that case, it’s more recommended to participate in another race of Mont-Blanc Marathon.

Before to register, we strongly recommend that you read the route, profile and estimated passage times to be fully aware of the difficulty of this race. The barriers times indicated take into account possible slowdowns that you may encounter and we strongly advise you to plan your race with a margin over barriers time.

Date: 3rd July 2021
Start: 8:00 pm
Place of start : Paragliders landing field in Chamonix
 20 km
Distance of heights : +/- 1400m
ITRA points : 1(Reference : ITRA ) 

Start to ‘Espoir’ Category and upwards

500 teams Maximum

Maximum time: 6 hours and 30 minutes

Night race by team of two (the 2 runners must run together on the whole race).

This event takes place on a route using mountain trails located between 1000m and 2200m of altitude, because of this weather conditions can change very quickly. That’s why it’s mandatory to bring the equipment noted below to protect yourself against unfavourable weather conditions.

No bib will be given to runners who don’t have their bag including all mandatory equipment during the race bibs distribution.

  • Mobile phone. 
  • A reserve of at least 0,50 litre of water.
  • Waterproof and windproof jacket with hood (gore tex type) adapted to your size.
  • Headlamp or chestlamp with spare batteries.
  • Survival blanket (140cm x 200cm).
  • Whistle.
  • Personal cup.
  • Mask

The time restrictions indicated below are given as an indication, they may be modified if necessary for the safety of the participants. In case of bad weather, and for security reasons, the organisation keeps the right to stop the event in progress or to change the time barriers. Any decision will be taken by the trail committee.

The arrival of a runner on a time bar outside the deadline implies his disqualification. The lower right corner of the bib will be “cut” by the postmaster and the runner will be invited to use public transport to return to Chamonix. If the runner wishes to continue the race, his bib number will be recovered by the postmaster and the runner will no longer be considered as a participant in the Mont-Blanc Duo étoilé, so he will no longer be under the responsibility of the organiser.

Anyone who doesn’t respect the volunteers in charge of this function will be banned from racing permanently on all events of the Mont Blanc Marathon.

  • Crossroad to the Caillet path (km 4.6) : starting time of the last wave + 1h15.
  • Refreshment of Montenvers (km 7.3) : starting time of the last wave + 2h30.
  • Refreshment of the refuge of Plan de l’Aiguille (km 13) : starting time of the last wave + 4h30.


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 Marathon Clips 

Réalisation : Coax – 2021.