Aug 2020 - Ascent from Lluest. Pen y Garn tops a 500–600m high plateau, which includes the controversial Cefn Croes wind farm. The summit has a very large shelter cairn hollowed out from the remains of an ancient burial cairn and a trig point. In fact, it's the only summit cairn I've encountered with an entrance hall! The wind turbines are very near the summit. To the north some 10km away, the whole Plynlimon range can be seen, including the summits of Y Garn, Pen Pumlumon Fawr, Pen Pumlumon Llygad-bychan and Pen Pumlumon Arwystli. The weather wasn't promising to say the least today so I opted for this smaller walk. Thoroughly enjoyed it though.The drive back to Rhayader afterwards over the Cambrian plateau and alongside the string of reservoirs into the Elan Valley was incredible.