Snodhill Castle is a ruined motte-and-bailey castle, about 1 mi (1.6 km) south of the village of Dorstone in west Herefordshire, England. It is recognized as one of the major castles of the Welsh Marches. It was built in the 11th century to secure the border between Norman England and the Welsh Princes. Archaeological excavations show that it was one of the first Norman castles in England to have stone-built fortifications, with more sophisticated defenses being added in later centuries.