The balisage (course demarcation) consists of “balises”(trail markers) made of strips of red and white ribbon, 60/80 long.
A reflecting ribbon is added in the night sections of the course.
There may also be some directional panels and in certain areas, also some yellow paint markings.
The ribbons are normally tied to the branches of the trees, at 1,5 to 3 m height. Where there are no trees, they are tied onto a stick, about 1m high, driven into the soil.
Where a bifurcation exists, at least two balises are placed on the right course in the 20 meters beyond the fork.
As a general rule, and whenever possible, the balises are placed at about every 300 m and are visible one from another If the topography and the weather conditions allow that.
If after running 4/500 m you do not see any balise, stop and check on the road-book (downloadable from this site), on a map, with a compass and, better, a GPS that you are on the right course.
You shall however consider that although carefully we place the balises in the last days before the raid and in spite of the passage of an “ouvreur” few hours before you, a risk always exists that some balises are removed or even displaced to mislead. Regrettably this already happened.
If you have a mobile phone try to contact the Race Direction (the numbers will be indicated on this site). And please report to the organisation (controllers, refreshing stations etc.)
We apologise, but in spite of our efforts we cannot avoid that some malevolent act may create you some problems.
For the France sector, the TOP 25 de l’IGN ( are advisable.
In particular : the « cartes de randonnée compatibles GPS » : 3841OT, 3741OT, 3742OT
For the Italian section, the map 109 at 25.000 « Gruppi Argentera e Marguareis », edizioni MULTIGRAPHIC