Ooh, Cardiff to Llandudno is ~300km along the A470 going through Pontypridd, Merthyr, Brecon, Builth Wells, Rhyader, Llanidoes, Caersws, Dolgellau, past the nuclear power station at Trasfwynydd, Blaenau Ffestiniog, Betws-y-Coed, Conwy and up to Llandudno.
That'd make a possible DIY 300 (and therefore a possible DIY 600 for Cardiff-Llandudno-Cardiff) although probably not great having a city centre finish on a Sunday evening...
Ooh, Cardiff to Llandudno is ~300km along the A470 going through Pontypridd, Merthyr, Brecon, Builth Wells, Rhyader, Llanidoes, Caersws, Dolgellau, past the nuclear power station at Trasfwynydd, Blaenau Ffestiniog, Betws-y-Coed, Conwy and up to Llandudno.
That'd make a possible DIY 300 (and therefore a possible DIY 600 for Cardiff-Llandudno-Cardiff) although probably not great having a city centre finish on a Sunday evening...