The Hoarwell (Mitheithel in Sindarin) was a great river of Eriador in Middle-earth. The Hoarwell began in the northern reaches of the Misty Mountains and then sped through the Ettenmoors, after which it bent south. The Great East Road crossed it at the Last Bridge, after which it was eventually met by the Loudwater, forming the Angle where the Dúnedain dwelt after the fall of Arnor. From there the Hoarwell formed the northern border of Eregion, until it was met by the Glanduin at Swanfleet and became the Gwathló.