I did the entire route today, 10 hours and 300km. There is a variety of roads on this route, from intricate twisty bits to long high speed sweeping bends.The first half is much slower than then second half, taking almost twice as long to ride.There are two sections where signs show the road as unsuitable for road bikes however there are easy diversions to miss these sections out if necessary.Some VERY hard surfaces but on the whole a very enjoyable day, I´d recommend it even if you have to do it over two days!
This route is massive. I only did from Renne to Guingamp.
Some of the route is 'good'.
But far the best route I've ever done was from St Mayeux to Guingamp.
It really was special.
It changes from one style to the next in five six stages with
exceptional corners only to finish in
the beautiful & historical Guingamp for a Cafe au lait.
Really made a good holiday brilliant! Thank you for posting this route.