From Servoz to Vallorcine, going through Les Houches, Chamonix and Argentière, 18 trail running circuits have been mapped down.
- S route from 1 to 2 hours
- M route from 2 to 4 hours
- L route for efforts lasting 4 to 8 hours.
A detailed trail running description was published and a specific sign system (numbers and 10 cm wide green strips) was added on trail marking posts.
The classification system refers to a number and a direction. All information and downloadable route descriptions are available on the valley website valleedutrail.com.