Segontium Roman Fort

LL55 2LN
Dogs welcome
Drone policy
No smoking

Special events

Segontium Roman Fort is open as part of our guided tours programme from May to August each year. These tours provide a unique opportunity to explore the site with expert insights into its history and significance. Want to be the first to know about new tour dates and prices?

Roman stronghold that passed into Welsh legend

Established nearly two millennia ago, this strategically-placed fort at the edge of the Roman Empire bustled with life for more than three hundred years.

Segontium was founded by Agricola in AD77 after he brutally suppressed a rebellion by the native tribe known as the Ordovices. Designed to hold a 1,000-strong regiment of auxiliary infantrymen, it was linked by Roman roads to the main legionary bases at Chester and Caerleon.

Thanks to excavated coins we know the Romans stayed until about AD394 – no other fort in Wales was held so long. Segontium not only controlled access to fertile and mineral-rich Anglesey but later helped defend the Welsh coast against Irish pirates.

Long after the final departure of the legions Segontium passed into Welsh legend as Caer aber Seint – ‘the fort at the mouth of the Saint river’ – mentioned in The Dream of Macsen Wledig, one of the ancient tales of the Mabinogion.

More about Segontium Roman Fort

Opening times & prices

Opening times

1st April - 31st March	Open all year
Last admission 30 minutes before closing Closed 24, 25, 26 December and 1 January

Visitor information

Car park

Parking is available on the main road adjacent to the monument for a small number of vehicles

Dogs welcome

Dogs on short leads welcome to access ground floor levels of the site.

Walking difficulty

Terrain: Level 2 – Easy

Venue hire

This site is available to hire for events, filming and exhibitions.

Drone policy

Please read our policy information about flying drones at Cadw monuments: read the guidance

No smoking

Smoking is not permitted.

Health & Safety

Care and attention must be paid when visiting this monument. It will be regularly exposed to the natural elements and may be slippery or muddy underfoot.

Appropriate footwear for the season and type of monument must be considered prior to your visit. Please only attend during the set opening hours, these have been chosen for your safety i.e. appropriate level of lighting.

Many of our monuments are located at areas of height, attention must also be paid therefore to the surrounding areas, ditches and moats when visiting.

Guardrails have been installed to prevent access to any areas of the site that we have deemed as dangerous or to prevent falls in specific areas. Please do not climb over or through any fixed installation.

Any handrail provided should be used to help you safely navigate historic steps, as these may be uneven and may be of different height.

As with all ancient monuments there is always a risk of stones being dislodged in bad weather, however, we manage this through extensive monitoring.

Climbing may result in serious injury.

There are several wild plants and flowers, although these are great pollinators, they may be poisonous to visitors and animals, we strongly advise you not to touch or allow dogs to eat any vegetation.

Please watch our health & safety film before visiting Cadw sites.

Iechyd a Diogelwch / Health and Safety

Please report any anti-social behaviour such as climbing, setting fires, graffiti etc. to CadwAccidentsReports@gov.wales

The following signs can be found around the site at key areas of risk, please pay attention where appropriate.