Mont-Blanc Marathon
The Mont Blanc Marathon is an international sporting event organized by the Club des Sports de Chamonixa non-profit association founded in 1905. Over 3 days, eight running competitions are organized around Chamonix, in the Mont Blanc massif.
As announced last spring, the environmental impact analysis carried out in 2023 revealed that 96% of the Mont Blanc Marathon's carbon footprint was linked to the transportation of participants and their companions. In 2025, in order to reduce our environmental impact, 40% of race numbers will be reserved for participants who commit to coming to Chamonix by train or bus. Carbon offsetting of all participants' journeys (home/Chamonix) will also be made compulsory.
2025 registration information
REGISTRATIONS 10KM / KV / YRM / MINI-CROSS
RESULTS DRAWS 90KM / 42KM / 23KM / DUO ETOILE
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News
Program
Thursday 26, Friday 27 and Saturday 28 June 2025
Place du Mont-Blanc - Chamonix
9:30am - 7:00pm: Trail Camp - Salon du Marathon du Mont-Blanc
9:00 am - 9:00 pm: Race number collection (salle EMC2) - by appointment.
Friday, June 27, 2025
90 km of Mont-Blanc
Place du Triangle de l'Amitié - Chamonix
- 4:00 am : Start of the 90km du Mont-Blanc
- 2:30 pm : First finishers of the 90km du Mont-Blanc
KM Vertical du Mont-Blanc
Place du Triangle de l'Amitié - Chamonix
- 4:00 pm : Start of the KM Vertical
- 9:00 pm: KM Vertical prize-giving ceremony
Planpraz
- 5:15 pm: First finishers of the KM Vertical
Saturday, June 28, 2025
23km / 10km / Mini-Cross / Young Race Marathon / Star Duet
Paragliding area - Chamonix
- 8:00 am: Start of the Mont-Blanc 23km
- 10:30 am : Start of the Mont-Blanc 10km
- 11:10 am: First finishers of the 10km
- 2:00 pm : Mini-Cross start - 800m
- 2:15 pm: Mini-Cross start - 2km
- 2:45 pm: Mini-Cross start - 3km
Planpraz - Chamonix
- 10:00 am: First finishers of the 23km
Place du Triangle de l'Amitié - Chamonix
- 3:00 pm: Start of the Young Race Marathon
- 3:05 pm: 90km, 10km and 23km Mont-Blanc prize-giving ceremony
- 4:00 pm : First finishers of the Young Race Marathon
- 5:00 pm: Mini Cross and Young Race Marathon prize-giving ceremony
- 6:00 pm: Elite presentation followed by autograph session
- 7:30 pm: Start of the Star Duo
- 9:45 pm : First Star Duo finishers
Sunday, June 29, 2025
Mont-Blanc 42km
Place du Triangle de l'Amitié - Chamonix
- 6:45 am : Start of the elite women's 42km du Mont-Blanc
- 7:15 am: Start of the elite men's 42km du Mont-Blanc, followed by non-elite runners
- 10:45am: First finishers of the 42km
- 4:50pm: Presentation of Club des Sports de Chamonix solidarity bibs
- 5:00 pm : Duo étoilé and 42km du Mont-Blanc prize-giving ceremony
Races
