The castle keep features walls approximately 2.5 meters thick at the base.
Llywelyn the Great constructed the fortress in the early 13th century to solidify his authority in the region.
The tower once housed a prominent prisoner, Owain Goch ap Gruffudd, who was held here by his brother Llywelyn ap Gruffudd for over 20 years.
The castle is a key example of a native Welsh 'Llywelyn-style' tower, contrasting with the concentric designs of Anglo-Norman castles.
Its location provided a clear line of sight to control movement through the pass connecting the Conwy Valley to the coast.
Dolbadarn Castle is a 13th-century Welsh fortress situated on a rocky crag overlooking Llyn Peris near Llanberis. Built by Llywelyn the Great, the site features a well-preserved round stone tower, or keep, that stands approximately 15 meters high. The castle served as a defensive fortification to control the strategic mountain pass between Gwynedd's coastal plains and the interior. It historically functioned as a royal residence and a prison for political captives. The site is currently managed by Cadw, the Welsh historic environment service. Visitors can explore the ruins and the surrounding landscape, which offers panoramic views of the glacial valley. The terrain surrounding the tower consists of uneven, rugged rock paths. It remains a notable example of native Welsh castle architecture distinct from the later Edwardian fortifications in the region.
From the base of the hill looking up at the tower with Llyn Peris and the surrounding mountains as the backdrop.
Wear sturdy, waterproof hiking boots as the approach path is steep and can be uneven.
Visit on a clear day to fully utilize the high-altitude vantage points for photography.
Keep dogs on a leash, as there are steep drops and rocky terrain surrounding the ruins.
Attempting to visit during severe high-wind weather, as the exposed cliff edges can become hazardous.
Avoid climbing on or defacing the historic stone walls; stay on designated paths.
