Few can argue that Snowdonia offers some of the best riding anywhere, not just the UK. The waypoints add up to a total of 835km including Adventure Waypoints and 780km of road. These would take 16hr 5min and 14hr 24min respectively according to the Satnav's optimised calculation.
There is a majectic view around every corner and mostly smooth and sticky road surfaces. Choice your route well and you will ride some of the highest passes in Wales. You could spend miles not seein another soul, apart from sheep of course.
Some of the road Waypoints may feel like you are actually trying to get to an Adventure Waypoint but thats just the way the minor roads in Wales are.
Make sure you plan carefully so you still have time to enjoy whats around you.