The Anduin ran through a steep valley above Lothlorien, which widened out further north where the River Gladden ran into it through great marshes. Here Isildur fell and lost the Ring. (The Shadow of the Past; Bk 1; The Disaster of Gladden Fields; Unfinished Tales).

Just before the point where the river Limlight joined the Anduin, Aragorn told them that they were then about 180 miles south of the Southfarthing – say some 240 miles south of Hobbiton. The Limlight rose in Fangorn and was the northern frontier of Rohan.