In reply to Pesda potato:
I've cycled the section to Rhyl as a work commute. Magic, cycling through Conwy town at dawn with herons galore on the estuary flats.. Did it once from Bethesda to Chester, took about 4 hours. Final section was along the Dee and coming out by the racecourse, through the playground as has been mentioned. Well surfaced and straightforward until Shotton.nBit of routefinding needed then. After that, it's sea front until Rhos on sea.
At the moment, the Rhyl promenade is a construction site, so it's easier to just bike on the adjoining 30mph road.
I hope you'll stay in lane as you pass Colwyn Bay Pier!
http://www.dailypost.co.uk/news/north-wales-news/crazy-colwyn-bay-cycle-lan...
There are often a lot of dog walkers out West of Pensarn. Their retractable ( and almost invisible) leads can present a hazard for cyclists.
Don't be tempted to leave the cycle route for the flatter, but deadly, A55 as it heads west of Abergwyngregyn.
Didn't we have a lovely time, the day we went to Bangor?
No.
I wouldn't bother going into the centre, unless you've tired by then and decide to put the bike on the train for the last leg.
Post edited at 20:19