A trail running challenge set amongst spectacular and harsh trails in the Black Mountains of Wales, starting and finishing in Crickhowell. The 40-mile event is a reverse of the 20-mile loop so runners catch any scenery missed on the first lap. Passing through forest trails, mountain tops, river crossings and ancient churches, with red kites as companions. Fully marked with marshal support and a generous 16-hour cut-off. Organised by Limitless Trails.