Cadair X Half Marathon

Possibly the toughest half marathon in the UK, and the most awe-inspiring. The route takes you through ancient woodland, past stunning glacial lakes, historic trails, and challenging mountainous terrain, including the summit of one of Snowdonia's most iconic mountains, Cadair Idris. Distance: 13.1 miles Height gain: 1165m Terrain: 65% trail, 25% mountain path, and 10% tarmac​ This is a mountain route with some challenging ascents and descents. The route will be arrow-marked, and has marshalled check points.