Mynydd Illtud

Mynydd Illtud is an extensive area of common land in the Brecon Beacons National Park, Powys, Wales, located approximately 4.8 km (3 mi) south-west of Brecon[1]. The undulating plateau sits between 330 and 370 metres above sea level, with its highest points at 381 metres at Allt Lom and 367 metres at Twyn y Gaer trig point overlooking the River Usk valley[1]. Twyn y Gaer contains the remains of an Iron Age hill fort dating to roughly 1500-500 BC, representing a significant prehistoric defensive settlement in the region[1].