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Iron Age settlement in a spectacular mountaintop location

Perched at the summit of Holyhead Mountain with expansive views in all directions, it’s easy to see why our Iron Age ancestors chose this spot. The rampart walls still stand 10ft/3m high and 14ft/4m thick in places, merging with the mountain’s rocky terrain to create what must have been an imposing fortification. The remains of the walls’ original internal walkway and narrow, funnelled entrance, set within a deep rocky gully, can still be seen today.

Though the massive enclosure circles an area of around 17 acres/6.9ha, the only structure found inside is the ruin of a later Roman watchtower and signal station, possibly linked to the nearby coastal fort at Caer Gybi.

Opening times

Daily 10am–4pm

Last admission 30 minutes before closing

Closed 24, 25, 26 December and 1 January


Category Price


Dogs welcome icon Drone policy icon No smoking icon


On Holyhead Mountain, 13/4m (2.8km) W of Holyhead
Holyhead 2m (3.2km)

For further information, please contact: Traveline Cymru on 0800 464 0000 or National Rail Enquiries on 03457 48 49 50.