I only wish there were more designated cycling trails such as Plas Y Brenin and the Gwydir Forest, around the rest of the Uk.
A walkers boot mark does not leave a long trench everywhere it goes, like that of a Mountain bike, allowing water to increase the erosion significantly.
Erosion caused by walkers, such as the path from the PYG track up to Crib Goch, takes decades to occur, whilst the damage in the forest behind The Royal Victoria Hotel in Llanberis, has happened in the last three years.
It was a huge error calling Mountain bikes by that name, it almost encourages owners to take them to places they do not belong, and charging down designated footpaths, expecting unaware walkers to give way.
The photograph is quite alarming, especially in the depth of a remote forest, where specially set up mountain bikers trails have been set up.
Such trails are carefully managed, for safety and erosion, and are almost devoid of walkers.
No, Mountain bikers should stick to the well established forest trails, and leave the mountainside alone, and one would hope such dangerous tactics are a rare event.