These paths are generally marked but imply an ability to tackle particular terrain.
 

Paths or sections over arduous or treacherous terrain (steep and/or slippery, grassy slopes, or mixed slopes of rocks and grass, or rocks and screed); varied terrain, at relatively high altitudes (stony ground, short snow-covered sections, open slopes without points of reference, etc.); rocky terrain, with technical difficulty (equipped paths, via ferrata routes of less difficulty). Excluded, instead, from this rating are routes over glaciers, even if flat and/or apparently without cracks (because crossing them would require the use of ropes and pick axe and a knowledge of anchoring manoeuvres).

 

Required: experience of mountains in general and a good knowledge of the alpine environment; sure-footedness and absence of vertigo; suitable equipment and physical preparation.