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Grosmont Castle

Big on the border

Grosmont is a member of an illustrious trio of strongholds. Along with Skenfrith and White Castle, it’s one of the ‘Three Castles of Gwent’ built by the Normans to control a key section of troublesome border country. The original earth-and-timber stronghold, build on a gros mont (French for ‘big hill’), was later replaced in stone.

It experienced an active life. Thirteenth-century reconstruction included the gatehouse and circular towers. Remodelling a century later gave Grosmont apartments fit for a noble household, but by the 15th century the castle was in the wars again, besieged in the rebellion led by charismatic Welsh leader Owain Glyndŵr.

Opening times & prices

Opening times

1st April - 31st March 10am–4pm

Last admission 30 minutes before closing

Closed 24, 25, 26 December and 1 January

Visitor information

Dogs welcome icon

Dogs welcome

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

Drone policy icon

Drone policy

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

No smoking icon

No smoking

Smoking is not permitted.

Directions

Google Map
Road: Grosmont, on B4347, 10m (16.1km) NW of Monmouth, 9m (14.5km) NE of Abergavenny
Bike: NCN Route No.46 (0.2m/0.3km)

Postcode NP7 8EP

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

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