Helsby hill fort is an Iron Age hillfort overlooking the village of Helsby in Cheshire, northwest England. Helsby Hill has steep cliffs on the northern and western sides, providing a natural semicircular defence. Double rampart earthworks extend to the south and east to provide protection to those flanks. Two additional banks have been discovered enclosing a rock ledge on the cliff to the north side. Excavations last century revealed a wall composed of sand and rubble, revetted with stone to the back and front.[1][2][3] The hill has a summit of 141 m AOD, and is a prominent landmark rising above the Cheshire Plain, with fine views overlooking the Mersey Estuary and into Wales. Much of the hill is owned and managed by the National Trust.[4] The surrounding areas are well wooded to the southwest, northwest and northeast with farmland to the southeast. The hill fort is protected as a Scheduled Ancient Monument.[5]