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Tour du Mont Blanc



105.7 mile 170.2 kilometer loop
74% Runnable


Ascent: 31,302' 9,541 m
Descent: -31,300' -9,540 m
High: 8,291' 2,527 m
Low: 3,225' 983 m


Avg Grade: 11% (6°)
Max Grade: 73% (36°)


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Trail shared by Kristen Arendt

One of the most renowned runs in the Alps.

Kristen Arendt

Features Commonly Backpacked · Historical Significance · Lake · River/Creek · Views · Wildflowers · Wildlife

The best time of year to run the full Tour du Mont Blanc is from mid-June to early September.


This 100+ mile tour of the Alps is an experience you won't soon forget. This loop is one of the most famous multi-day adventures in the world, and while it will challenge you, it will also reward you with unforgettable scenery as you circle Mont Blanc, the tallest peak in the Alps.

Need to Know

You can break this loop up in many ways thanks to the extensive hut system (huts every 6-10 miles). Most huts have food, water, and other amenities. You can also stop off at one of the seventeen towns—and many smaller villages—along the route.

Runner Notes

Home of the prestigious UTMB course, this loop is a bucket list for many ultra-runners.


There are an infinite number of ways to run the Tour Du Mont Blanc (TMB)—with a variety of huts and refugios along the circuit, you can customize the length and difficulty of your run. Ambitious trail runners might tackle the full loop in a (long) day and runners can pick and choose how luxurious or rugged to make the route by breaking up the daily mileage or stopping off for extended stays at the many huts along the route.

However, you tackle the loop, it will be a challenge with a total elevation gain and loss of around 32,000 feet. All along the way, you'll be treated to outstanding views of Mont Blanc, one of the most impressive mountains in the Alps (and arguably) in the world.

And as impressive as the Alps and Mont Blanc are, that isn't all you get to see—the route is peppered with alpine meadows and lakes, historic sites, wildlife, wildflowers, and charming towns and villages. You'll navigate through France, Italy, and Switzerland--be sure to stop off and enjoy some of the local food and beverages along the route as well.

Check out REI's travel guide for recommendations on how to run the TMB and what sights you won't want to miss!

For some suggestions on itineraries, current weather, booking information, guides, and other information, check out the TMB General Information.

Flora & Fauna

Keep an eye open for chamois, mountain hares, marmots, foxes, eagles, vultures, snakes and lizards. Spruce and larch with a variety of wildflowers in summer.

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Dogs Allowed, History & Background

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34 Views Last Month
34 Since Jan 11, 2020



Mont Blanc from the Aguillette des Posettes
Aug 20, 2016 near Chamoni…, FR
Ibex guarding his turf.
Jul 12, 2016 near Chamoni…, FR
Ibex in the Flegere ski area.
Jul 12, 2016 near Chamoni…, FR
The resident ibex know they have a good home.
Jul 12, 2016 near Chamoni…, FR
Outstanding trail running on the Aguillette des Posettes
Aug 20, 2016 near Chamoni…, FR
It's a snowy July this year!
Jul 11, 2016 near Chamoni…, FR


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