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).
The plan today was for me to take friend Leigh up Moel Siabod (his first ascent) via the Daerr Ddu ridge. It was a hot day but we got a good move on. coming to the top llyn, we were about to stop to fill up the water bottles prior to tackling the ridge, when Leigh spotted a rock face he wanted to climb. I told him it wasn't a good idea and that although we had plenty of time left in the day, getting hurt doing this would not help us. Unfortunately Leigh decided to continue the climb, and subsequently slipped and fell approximately 4 metres onto his leg and hip / back.
