Solidarity and environmental bibs
Registration for the 2025 solidarity and environmental bibs is now full.
The purchase of a solidarity or environmental bib is an opportunity for runners to guarantee their registration for one of the Mont Blanc Marathon races (without drawing lots), while contributing to a solidarity and impact project.
Help preserve our environment!
Since the creation of the Cross du Mont-Blanc in 1979, the Club des Sports de Chamonix has been working to offer quality races while limiting their impact on the environment.
Today, more than ever, climate and environmental issues are at the heart of our concerns. Through the sale of environmental bibs, our aim is to participate in an ecological movement that goes beyond the framework of our event, and to have a positive impact directly on our immediate environment.
In 2026, 40 environmental bibs will be sold, divided between the Duo Etoilé, the 23km, the 42km and the 90km of Mont-Blanc. The funds raised through these donations will directly contribute to financing local environmental initiatives.
I RESERVE AN ENVIRONMENTAL BIB
Support medical research and patient care!
Vaincre les Maladies Lysosomales
Since 2013, the Mont Blanc Marathon has partnered with Vaincre les Maladies Lysosomales, a patient association recognized as being of public utility, whose primary objective is to support research for the benefit of 60 rare diseases and to support patients and their families in their fight.
VML's raison d'être is based on an ultimate goal: the cure of people suffering from lysosomal disease. The association has set itself three missions for the benefit of the greatest number of people:
- To advance research and improve access to care;
- To provide certified and appropriate scientific and medical information;
- Support and help families adapt to illness and disability.
With more than 500 solidarity race numbers and €300,000 donated to medical research in 12 years, the loyalty of Mont Blanc Marathon runners makes a real contribution to supporting scientific advances and developing new treatments.
In 2026, the Mont-Blanc Marathon will once again offer 55 solidarity race numbers in aid of VML, divided between the Duo Etoilé, the 23 km, the 42 km and the 90 km of Mont-Blanc.
I RESERVE A RACE NUMBER IN AID OF VML
Trail Runners Against Muco
The Mont Blanc Marathon has joined forces with Trail Runners Against Muco in the fight against cystic fibrosis, a genetic disease that mainly affects the respiratory and digestive systems.
For over 20 years, the Chamonix-based association Trail Runners Against Muco has been taking on sporting challenges to raise funds for Vaincre la Mucovicidose, including participation in the Mont-Blanc Marathon races. Their motto: "Let's give our breath to those who lack it, and together let's win life!"
By supporting Vaincre La Mucoviscidose, Trail Runners Against Muco contributes to the following objectives:
- Raise funds to support medical and scientific research aimed at finding more effective treatments and, ultimately, a cure for cystic fibrosis,
- Improve patients' quality of life by offering them appropriate support, helping them to manage their disease on a day-to-day basis, and providing them with social and psychological support.
- Raise awareness and inform the general public about the disease and its challenges.
In 2025, €38,000 in donations were collected thanks to the 30 solidarity bibs allocated to Trail Runners Against Muco. The entire amount was donated to Vaincre la Mucoviscidose.
In 2026, the Mont-Blanc Marathon will once again offer 30 bibs for TRAMUCO, divided between the Duo Etoilé, the 23km, the 42km and the 90km of Mont-Blanc.
Ultra Sports Science
The Mont Blanc Marathon has teamed up with Ultra Sports Science to support medical research into ultra-endurance sports.
Created in 2015, Ultra Sports Science aims to:
- Raise funds to set up international medical research,
- Transmit the results of this research to athletes, scientists, doctors, organizers and sports federations,
- Implement a health policy to prevent doping.
Thanks to the €14,500 raised in 2024 via the Mont Blanc Marathon solidarity bibs, Ultra Sports Science was able to carry out awareness-raising campaigns in various fields linked to ultra-sports, and produce a documentary on the prevention of exercise-induced hyperthermia(available here).
In 2026, the Mont-Blanc Marathon will once again offer 25 health bibs in aid of USS, spread over the 90km, 42km and 23km.
I RESERVE A RACE NUMBER IN AID OF USS