From its source at Lake Evendim the Brandywine (Baranduin) River meandered south through Eriador and entered the Great Sea to the south of the Blue Mountains.

In its entire length the Brandywine was only crossed at two points, at Sarn Ford in the South of The Shire, and at the Brandywine Bridge (Bridge of Strongbows) where the Old Forest Road crossed it.

The River served as the Eastern Boundary of the Shire (except for Buckland) and from the years 861 through 1974 of the Third Age the length of the river from the Old Forest Road to the Great Sea served as the eastern boundary of Arthedain.
Encyclopedia entry originally written by PotbellyHairyfoot