Camino de Santi... (not verified) said:

The mountain route is not maintained and poorly marked. The shells point in weird directions, there’s tons of grass and plant overgrowth on the trail. We felt like the only people to do it in months. We made the mistake to go in the rain and had to bail part way through. Don’t do it!!!! (Unless it’s sunny and you are prepared to check the map constantly).

The Ballota Route (after Ballota, the part we walked) was really pleasant with hidden beaches.