Boundary wall, screen and gateway, SW side of Llanrug-Llanberis 'Mountain' Road at Bryn Bras Castle

The boundary wall, screen, and gateway are located on the southwest side of Llanrug-Llanberis 'Mountain' Road at Bryn Bras Castle. The wall is constructed from roughly coursed rubblestone with stone-on-edge coping, while the screen and turreted gateway feature more regularly coursed stonework. The wall varies in height, being lowest between the two lodges and highest near Fernlea. On the northwest side of Fernlea, it serves as a decorative screen with embattled square corner turrets that have blind rectangular 'arrow' slits, along with two round-headed arches that contain boarded doors in the wall. This screen leads to a gateway that is set back from the road, which provides access to the former stables and outbuildings, now known as Nos. 1-3 The Turrets. The gateway consists of two embattled circular turrets and iron gates topped with an overthrow that incorporates a decorative lantern made by Brunswick Ironworks in Caernarfon, with the letter 'A' at each end. From the right turret, the wall curves towards the road and continues under the archway that links the two parts of Bryn Bras Castle.