Looking for a recommended route from Roscoff taking in some interesting towns to stay in B&Bs along the way. We're on hybrids so looking at doing no more than 35-40 miles per day for 4 days, returning back to Roscoff.
Going into and out of Roscoff it's definitely worth taking the voie verte (it goes past the ferry terminal entrance) and not the main road.
I would be very wary of using routeplanning sites as you generally have no way of telling whether a route is one that someone has carefully researched and ridden, or has been put together by a local, or has been thrown together in 2 minutes by someone who knows even less about the area than you do. They are useful though if you have a route in mind and want to know how hilly it is, as they will generally produce 'altitude profiles'.