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Britannica Sources used in this answer

How long was Hadrian’s Wall?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
Historical map of ancient Britain featuring three sections: a main map of Roman Britain showing Roman roads, frontier walls, principal settlements, forts, mines, and key tribal regions; an inset of prehistoric Britain marking Neolithic, Mesolithic, and Bronze/Iron Age sites; and a smaller map illustrating the stages of Roman conquest with color-coded tribal territories and years of conquest.
Roman Britain

Hadrian’s Wall extended for 73 miles (118 km) across northern Britain, running from Wallsend on the River Tyne in the east to Bowness on the Solway Firth in the west. While the wall itself spanned this distance, the associated system of fortlets, towers, and forts continued for at least an additional 26 miles (42 km) southward along the Cumbrian coast.12