Marathon du Mont Blanc 2025

• Challenging scenic routes through the Aiguilles Rouges Nature Reserve with views of Mont Blanc.
• Offers diverse races: 90km, 42km, 23km, 10km, VK, Duo Etoilé night race, mini cross, and young marathon.
• Environmental focus with efforts to raise awareness about preserving natural surroundings.
• Extensive support services include therapists and massage therapists for recovery.
• Convenient accommodation packages with hotel and transfer options available.

The Marathon du Mont Blanc is a demanding trail marathon that challenges runners with 42 kilometers of stunning alpine terrain and an elevation gain of 2540 meters. Starting in the lively village of Chamonix, at the Place du Triangle de l'Amitié, the course weaves through scenic hamlets like Les Bois, Lavancher, Argentière, Le Tour, and Vallorcine. Known for its steep ascents, runners crest the Aiguillette des Posettes at 2185 meters before descending into the charming Vallorcine and encountering the rugged beauty of the Aiguilles Rouges nature reserve. Runners experience a formidable climb to La Flégère at 1875 meters before a challenging descent through serene forests back to Chamonix. The race is celebrated for its breathtaking visuals of mountain landscapes, steep gradients, and varied terrain, making it considerably tougher than conventional road marathons. Participants face extreme altitude and the summer sun, testing their endurance and resilience. The marathon is part of a broader weekend festival featuring multiple race formats, attracting global athletes and spectators, and is revered among trail running enthusiasts for its picturesque yet grueling course. In a bid to minimize environmental impact, event organizers have innovatively allocated 40% of race entries for participants who arrive via train or bus, and mandatory carbon offsetting for all travel. Runners seeking registration information, race details, and logistical advice should visit the official website and familiarize themselves with course specifics and schedule timings.

Expect temperatures between 68-86°F (20-30°C) in the valleys, with cooler conditions at higher elevations during the Marathon du Mont Blanc in late June. Prepare for heavy rainfall and afternoon thunderstorms, which can bring sudden drops in temperature. Cool winds and occasional snow at higher elevations may also impact the course, so check forecasts and plan accordingly.

90km Mont-Blanc

The 90km Mont-Blanc course is a formidable challenge, stretching over 92 km with a staggering 6,330 meters of ascent and descent. This technical trail weaves through the rugged beauty of the Alps, reaching altitudes between 1,500 and 2,500 meters. Runners will face narrow and exposed sections, often encountering snow, demanding both skill and confidence. The race is renowned as one of France's most technical, requiring seasoned mountain running experience, high-altitude acclimatization, and the ability to endure rapidly changing weather conditions.

42km Mont-Blanc

This 42km course offers a thrilling journey through alpine trails, climbing and descending 2,540 meters. The route culminates at the iconic Place du Triangle de l'Amitié in Chamonix. Participants will navigate semi-autonomous sections with three full feed stations, tackling mountain terrain that tests their adaptability to varying weather.

23km Mont-Blanc

The 23km race is a compact yet intense adventure, with 1,680 meters of ascent and 870 meters of descent. Runners traverse stunning landmarks like Col du Corbeau and Aiguillette des Posettes. The course demands agility and stamina as participants manage steep climbs and descents, supported by two refreshment points along the way.

10km Mont-Blanc

Perfect for those seeking an introduction to trail running, the 10km course follows cross-country ski trails with a 325-meter vertical drop. Though short, this discovery trail requires self-sufficiency, providing no intermediate refreshments and challenging runners to remain comfortable on the varied terrain.

Star Duo

The Star Duo offers a unique 21km team experience, with 1,450 meters of ascent and descent. Teams must cross timing points and finish together, fostering camaraderie. With two full refreshment stations, this duo race combines the beauty of mountain trails with the joy of shared achievement.

In summary, the Marathon du Mont Blanc presents an array of courses that test endurance and skill against the backdrop of breathtaking alpine landscapes. Each race offers its own set of challenges and rewards, making it a must-experience event for trail enthusiasts.

Visiting Chamonix for the Marathon du Mont Blanc offers a captivating mix of athletic endeavor and cultural discovery. Beyond the race, Chamonix is a treasure trove of natural beauty and local charm. Start by ascending L’Aiguille du Midi via Europe’s highest cable car for breathtaking views of the Mont Blanc massif. For a unique experience, take the historic Montenvers cog train to the Mer de Glace and explore its fascinating ice cave. The Tramway du Mont Blanc offers another scenic ascent, leading to Nid d’Aigle with its stunning vistas.

Immerse yourself in Chamonix's vibrant culture by visiting the Alpine Museum to learn about the area's mountaineering heritage. Engage with local artisans and discover traditional crafts, or enjoy live music at various venues throughout the village. Don't miss the opportunity to experience traditional festivals like the Fête de la Musique, which adds a lively atmosphere to your visit.

For a more leisurely pace, stroll through Chamonix's picturesque streets, sampling local cuisine in charming restaurants and exploring quaint shops. Outdoor enthusiasts will find plenty to do, from hiking the Pointe de Vue trail to enjoying summer days at Lac de Passy. Chamonix promises a rewarding blend of adventure and relaxation, making it an ideal destination for marathon travelers.