Marathon du Mont Blanc 2025. Info and routes.
Marathon du Mont Blanc 2025 - Chamonix, France
Friday, June 27, 2025
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Information about Marathon du Mont Blanc 2025
- Event name:Marathon du Mont Blanc 2025
- Date and Time:Friday, June 27, 2025
- City:Chamonix
- Country:France
- Latitude and Longitude:45.923697 / 6.869433
- About the event:The creation of the Mont-Blanc Marathon
The Cross du Mont-Blanc was born on July 1, 1979, on the initiative of the Club Alpin Français (CAF) de Chamonix, chaired at the time by Georges Costaz and Christian Roussel, both keen runners. For the first edition, 450 participants took to the valley's trails, finishing in Planpraz.
Over the next 24 years, the Cross du Mont-Blanc grew to attract almost 1,000 participants every year. In 2003, the race took a turn and became the Mont-Blanc Marathon: the legendary 23km was joined by the 42km it is still known for today. This was followed by the creation of the 10km, more accessible to the general public. From then on, registrations grew exponentially, to the point where the number of runners able to register for the Cross and Marathon had to be limited from 2010 onwards. The Mont Blanc Marathon then continued to develop, with the creation of the Kilomètre Vertical in 2011, the 80km in 2013 (which later became the 90km), and finally the Duo Etoilé and Young Race Marathon in 2015.
The event takes on another dimension in 2018 with Salomon's creation of the Golden Trail World Series, of which the 42km Mont Blanc Marathon will be part until 2024.
Today, the Mont-Blanc Marathon brings together over 10,000 runners every year, taking part in 8 unique races in the Mont-Blanc massif: the 90km, 42km, 23km, 10km, Kilomètre Vertical, Duo étoilé, Young Race Marathon and Mini-Cross. - Virtual Race?No
- Trail?No
- Cross country?No
- Multi-stage event?No
- Flier:Not available
- Ranking:Not available
Marathon du Mont Blanc 2025 route
Race 3 - 23 km
No course map available.
Race 4 - 10 km
No course map available.
Chamonix weather forecast
Other nearby races
Events on the same day at a distance of less than 50 km (31 from Chamonix as the crow flies are reported here.
No running race found within 50 km.
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Running pace chart
Tools for runners: running pace chart.
Pace to time converter.
Find travel times at different distances keeping the same pace.
Calculate your speed
Tools for runners: pace to time converter.
Calculate your pace and your speed and get your personal running pace chart.
Race time predictor
Tools for runners: race time predictor.
4 methods to predict your finish race time.
Hilly Route Analysis
Tools for runners: Hilly Route Analysis.
Learn how a route with hills and descents can affect your running pace..
World Marathon 2025
Find your perfect marathon! Check the 2025 calendar with all dates and locations
How to start running
Tools for runners: how do I start my first run?
Create your first workout plan to run up to 60 minutes!
10 km Training Plans
Tools for runners: 10 km training plan.
Do you want to run a 10 K (6.2 mi)?
Create your 10 km training plan! Tables for times from 35 minutes to 1 hour and 15 minutes, with customizations
in 1 minute steps (that is, for example, you can choose 40 minutes, or 41 minutes, and so on). Fast link:
10 km in 35 minutes
10 km in 40 minutes
10 km in 45 minutes
10 km in 50 minutes
10 km in 55 minutes
10 km in 1 hour
10 km in 1 hour and 15 minutes
Half-Marathon Training Plans
Tools for runners: half-marathon training plan.
Do you want to run a 21 K (13.1 mi)?
Create your half-marathon training plan. Tables for times from 1 hour and 20 minutes to 2 hours and 30 minutes,
with customizations in 1 minutes steps (that is, for example, you can choose 1 hour and 47 minutes, or 1 hour and 48 minutes, and so on).
Fast link:
Half-Marathon in 1 hour and 30 minutes
Half-Marathon in 1 hour and 45 minutes
Half-Marathon in 2 hours
Half-Marathon in 2 hours and 15 minutes
Half-Marathon in 2 hours and 30 minutes
Marathon Training Plans
Tools for runners: marathon training plan.
Do you want to run a 42 K (26.2 mi)?
Create your marathon training plan! Tables for times from 2 hours and 40 minutes to 6 hours, with customizations in 1 minute steps
(that is, for example, you can choose 4 hours and 5 minutes, or 4 hours and 6 minutes, and so on). Fast link:
Marathon in 2 hours and 40 minutes
Marathon in 3 hours
Marathon in 3 hours and 30 minutes
Marathon in 4 hours
Marathon in 4 hours and 30 minutes
Marathon in 5 hours
Marathon in 5 hours and 30 minutes
Marathon in 6 hours
