No special access issues
Cabo Negro (20min)
The hike down the cliff is a bit delicate, it’s necessary to be sure-footed.
Two paths to go down : the second one is a bit easier and it feels less high (height difference:-35 m).
After 10 min un a rather flat terrain, you arrive at the Menhir de Tresmurios. A few meters further you will see a pole, path 1 starts just here (-45 m).
For the second path, continue from the pole to the right, leave a first path on the left that goes through thorny shrubs (long pants advised), and go 100-200 m further on a more confortable path (but at first less visible). At the top of the cliff you see now the boulders down and there you find another path going down to the Cantábrico boulder.
Take the tides times into account as the place can be dangerous with strong waves.
Blocs 13-17 : wait for low tide
After rain wait at least 10h to get the boulders dry.
Playa Negra (15 min)
Park at Mirador de Portazuelos. Then follow the dirt road (take right at the fork) until you reach the top of the cliff. There you see the Poseidón boulder. 100 m before a path is going down and then follow the rocky slopes to the blocs (height difference : -35m).
Climbing possible only at low tide.
After rain wait at least 10h to get the boulders dry, and more for bloc 3.
Water & supplies : in Montmeril there is a fountain at the church, and a grocery store in the village.