Cadair Idris or Cader Idris is a mountain in Gwynedd, Wales, which lies at the southern end of the Snowdonia National Park near the town of Dolgellau. The peak, which is one of the most popular in Wales for walkers and hikers,[1] is composed largely of Ordovician igneous rocks, with classic glacial erosion features such as cwms, moraines, striated rocks, and roches moutonnées.
9 OB students from Scotland, 13-14 years old. Doing a two day expedition. Started from Mary Jones chapel and headed up the pony path to the Saddle. Dumped expedition bags and walked to the summit of Cadair Idris and back down to the bags. Continued walk to Craig Las and camped at Llyn Cyri. Walked out to Morfa Mawddach train station after camping. 
