The Moelwynion (a Welsh plural, sometimes anglicised to Moelwyns) are a group of mountains in central Snowdonia. They extend from the north-east of Porthmadog to Moel Siabod, the highest of the group. The name derives from the names of the two largest mountains in the group, Moelwyn Mawr (great white hill) and Moelwyn Bach (little white hill).
St.735571 & follow track to Quarry @ 716554 and then Llyn y Foel. Walk around to gully @ 707546 and scramble up to summit of Moel Siabod (872) walk down the western flank to Plas y Brenin & then to the café
