As the second mountain in the Tŷ Hafan Welsh 3 Peaks challenge, Cadair Idris is widely regarded as the toughest climb. You climb uneven steep steps for an hour before the glory of Cadair Idris unfolds before you. Then there is the up and down to the peak as you traverse the Llyn Cau lake. I love it. It is my favourite mountain of the three. Cadair Idris is in the historic county of Meirionnydd, Wales and lies at the southern end of the Snowdonia National Park near the town of Dolgellau. The mountain stands at 893 meters above sea level and is the 19th highest in Wales (grid reference SH711130). In 2010, I was climbing the mountain for the very first time and was totally in awe of the spectacular views. It was hot, but relatively clear and I enjoyed every step.