Adventure style trail. Loose with tunnels.
From the embassament de Cúber you climb a bit on a singletrack. The downhill starts on a wide loose gravel field, then enters the steep forest.
After a short pushbiking section, the descent follows the big water pipes. The surface is often loose with baby heads, steep and interrupted by three tunnels. Inside there is no light and because of the length you see nothing. Better bring lights because of the uneven surface in the tunnels.