The Lord of the Rings: Shadow of the East
The Anduin is the mightiest river in western Middle-earth. Rising near the slopes of the Grey Mountains, the Anduin travels through many lands before it empties into the Bay of Belfalas in southern Gondor. Only one bridge, at Osgiliath, crosses the Anduin. Another existed by the Iach Iaur, but it has fallen into disrepair, and if it still stands, it is dangerous to traverse. Fords and ferries at Tirith Anduin, Iach Iaur, and Mathlaburg provide the only other safe crossings. Difficult fords can be found at the Carrock and in the Wold. Those wishing to cross elsewhere are wise to construct a sturdy vessel first, for the Anduin’s current is powerful and unpredictable, even where it does not flow swiftly. All folk in Middle-earth know the sad tale of how Isildur sank beneath the powerful current as he fled an Orcish ambush.
Traffic on the Anduin is quite common, especially where it passes through Gondorian lands. Large ships can travel all they way to the Undeeps, though most sea-going vessels unload their wares at Harlond. The Falls of Rauros are an obstacle to passage into northern Rhovanion, and one usually changes to small river-craft there. Travel north of the Rauros is occasionally dangerous, due to the swiff currents fed by run-off from the mountains. A traveller would be prudent to hire an experienced guide before testing the dangers of the Anduin. As perilous as it may be, the river remains the safest avenue to the North, for no right-thinking Man would risk passing under the wood of Lothlórien or the shadow of Dol Guldur.