An ultra-trail footrace starting and finishing in Cardiff, crossing the South Wales Valleys and the Brecon Beacons! A demanding test of endurance over varied and challenging terrain, only suitable for experienced and competent ultra-trail runners. The route has approximately 6400m of ascent and is over 90% on trails. The SW50 is the second half of the SW100 route, starting from the Pont ar Dawe Car Park at the foot of Pen y Fan. 3200m of ascent. The SW100 Walkers/non-competitive, starts at 1500 on Friday with an overall cut off time of 44 hours.