Hi Jenny,
So happy for you, walking another camino! My husband and I walked the Norte in June and July. We had also walked the Frances, and although we felt the Norte was a bit more strenuous (elevations not so high, but more numerous), we enjoyed it very much. We had nice weather the first day, so we found the mountain “Alpinista” route to be no problem, a very nice walk. I do remember thinking it would be no fun in the rain/mud.
About your reference to the “top of the ridge,” A word of caution : After we had come down off the heights of Jazikibel, where the Camino meets the road, we were encouraged to go ACROSS the road to take a GR route (don’t know the number, but it was marked with the red and white stripes). We ended up high on a rocky ridge top that we found very dangerous - sheer drop on the left, rocks on the right, a narrow path over the rocks, a cable to hold onto, and no ocean views at all. We came out high above the little lighthouse with Pasaia far below us. I’ve never been pushed so far beyond exhaustion.
This is probably not the ridge you had in mind, but just in case...
Have a wonderful camino!