Hi,
I’m not the best person to give expert advice on what to pack in your bag.
So far, I’ve walked the GR34 from Mont Saint-Michel to Pointe de Corsen (the westernmost point of mainland France).
“It’s beautiful everywhere”—though there might be a few less scenic sections. From what I remember, parts around the inner bay of Saint-Brieuc and certain stretches of the Goëlo coast (can’t pinpoint exact spots).
But if I had to do it again, I wouldn’t skip those sections, and I’d walk the whole trail again.
There are still two parts where the GR34 veers far enough inland that the vibe shifts from coastal to countryside:
1—Right after the start, a long detour inland to Mont Dol. Mont Dol itself is interesting (viewpoint, activities), so you’ll need to decide whether to include it in the route or visit it separately. If you keep it in the GR34 route, it adds quite a bit of distance compared to sticking close to the coast. Your call.
2—Leaving Saint-Michel-en-Grève (22), the GR34 leaves the coast, cuts through the countryside, and rejoins the sea at Grand Rocher. In my opinion, this detour isn’t worth it—better to take the direct route from Saint-Michel-en-Grève to Grand Rocher (about 2 km, plus the climb to the Grand Rocher viewpoint).
Valmichel86