The Black Mountains prop up the eastern end of Brecon Beacons National Park, a dark, brooding wedge of hills running from Abergavenny to Hay-on-Wye. The long-distance Offa’s Dyke Path trundles across the range, but hiking opportunities are limitless. The main way in for campers is the Vale of Ewyas, with its Abergavenny-Hay-on-Wye road bisecting some remote countryside below the ridges. Sites here are typically simple and small-scale.