3 - 4
FATMAP difficulty grade
Starting at Bulnes this route goes through farmland before climbing up the steep canal de Amuesa with its impressive vertical walls.
You come to some amazing summer pastures with their stone huts before a continual climb up an ever increasingly rocky track.
Although the path has some waymarks attention is needed so as not to divert off the path.
The scenery (and the path) becomes more dramatic as you climb high up into the limestone peaks and depressions.