Coastal mainly flat route, ~ 50 miles on bike computer. Good cycle paths most of the way, between Conway and Bangor paths get a little more difficult to follow.
Well, the route itself is pretty good, however, Rhyl can be hazardous because of sand, and the daft route that goes though the sea front buildings, especially on a racing bike, be wary of other people loose dogs going from Prestatyn to Rhyl, although the route is pretty flat, there are some surprising mini hills, overall it's not bad, but be wary of tourists with there children and dogs.