September came in with golden days and silver nights, and they rode at ease until they reached the Swanfleet river, and found the old ford, east of the falls where it went down suddenly into the lowlands. Far to the west in a haze lay the meres and eyots through which it wound its way to the Greyflood: there countless swans housed in a land of reeds.
- The Return of the King (Book 6), Chapter 6
The Swanfleet is a vast marshland surrounding the joining of the rivers Glanduin and Mitheithel. It was once home to the Stoors, a Hobbit people, but they moved to the Shire after their numbers were greatly reduced by the Great Plague.