You will be following one of the (many) ancient 'Caminos' that the locals used to take their animals up into the hills for better grazing. They would possibly spend weeks at a time up there and have to live off the land.
The last 200 metres of the ascent is a scramble where you will need to use your arms as well ( no ropes are needed)
There is a path which is quite well defined.
Local knowledge is always helpful
Please follow the directions that I have given you as they will take you up and back safely and quickly.The trackback facility on your GPS may come in useful here.
Do not go in the rain as it is very slippery.