Ruthin Castle Hotel is located in Ruthin, Wales, one mile from the town centre, 11 kilometres from Denbigh, and 20 miles from the Snowdonia National Park. It is also 23 miles from ancient Roman city of Chester. Hotel Features. Originally built in the 13th Century, Ruthin Castle is situated in 30 acres of woods and parkland, and features a wood panelled lobby decked out with hunting trophies, a chandelier, oil paintings, and period furniture.