A 64 km (40 mile) mountain ultra in the Bannau Brycheiniog (Brecon Beacons) National Park with approximately 2,570 m of ascent. The route traverses high mountain terrain including ridgelines, summits and open upland sections across the central Beacons. Runners encounter steep climbs and descents on mountain paths with exposed sections on higher ground. The course is fully marked with checkpoints and aid stations positioned at key locations. Held in spring, the race explores remote areas of the national park between major peaks.