Is the Castillo de Fuentidueña able to be walked/hiked? If not which would be the nearest hilltop that has a good view of the western horizon?

I'm traveling through the north of Spain in August for the solar eclipse and specifically I'll be in Fuentidueña for the eclipse. Looking at topographical elevation maps of the area, the Castle ruins are the tallest point in the area, but I now see a review for that landmark that a fence was put up about 5months ago and is no longer able to be entered?

Am I still able to walk/hike the perimeter of the hillside to have a good view of the sunsetting eclipse?

This eclipse will be low in the sky when it happens so I need a good vantage point if that hilltop isn't accessible.