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 at Bryn Glo carpark and head towards Moel Siabod. Go past the quarry and head to the South East ridge. Follow the ridge up over the grade 1 scramble to the summit of Moel Siabod (872). walk down by following the main ridge down to the start point.
