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).
Start 657456 to Llyn Croesor walk to quarry at 657465 onto lake at 656470 to ridge at 652472 then onto Cnicht (689). Return along ridge to 657476 then to 662469 Llyn Cwm Corsiog then back to campsite. Really sunny day
