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Our 2027 tours are now available for booking!

Runners traverse grassy trail next to ridge line
Photo - Dan Fitzgerald
Runners in distance on ridge
Photo - Dan Fitzgerald
Runners run along ridge line trail
Photo - Dan Fitzgerald
Grassy mountain ridge line with clouds
Photo - Dan Fitzgerald
Runners is distance on ridge line single trail
Photo - Dan Fitzgerald

Region: Upper Chamonix

Difficulty
2/3
Technicality
1/3
Popularity
3/3

This is one of the absolute classic trail runs in the region. You’ll quickly gain expansive views as you climb the Aiguillette des Posettes—and they only get better! Add the optional loop to Croix de Fer to see a wide swath of the Swiss and French Alps. There’s great food en route, too—so bring a few euros and save time for a culinary stop!

Bonus KMs and Bailouts

The bonus kilometers offer big rewards, so try to include them if you have time!

Note that not every run has a bailout. But if a run does, we've included the download below.

Additional Information