Of course, just realised your post was from Monday. Compared with the Cantabric coast the ride in Galicia would be a doddle. Glad you enjoyed it.You should be.
It's only 50km from Boimorto to Santiago and not hilly either with compared to the rest of the tour. I was here by 11.30 on Monday morning.
It is an interesting experience.
Bit of trivia, Boimorto in Galego means dead bull.