Trail à la Noix is a trail running event held in Salignac-Eyvigues, located in France’s Dordogne region, and is listed on the April running calendar. The event features three morning races: a 42 km trail with 1,200 m of elevation gain, a 22 km trail with 600 m of elevation gain, and a 10 km discovery trail with 400 m of elevation gain.
The organizer also categorizes the routes by "effort" distance, providing a clearer sense of the climbs. The 42 km route is equivalent to 54 km of effort, the 22 km route to 28 km, and the 10 km route to 14 km. This approach accommodates various runners on the same day, from those testing their limits on a compact yet steep course to participants seeking a longer run in the Dordogne.