- "Our home, Greywater Watch, is no castle you've ever seen. And seeing it once does not mean you'll ever find it again. For Greywater Watch... moves."
- ―Meera Reed
It is the home of Jojen and Meera Reed and their father, Lord Howland Reed. It is the southernmost stronghold in the North, and as such its rulers have a longstanding enmity with House Frey, who rule the area of the Riverlands on the southern side of the Neck.
In the books
In the A Song of Ice and Fire novels, Greywater Watch is the seat of House Reed, one of the most loyal vassals of the Starks.
In A Storm of Swords, Robb Stark sends Maege Mormont and Galbart Glover to Greywater Watch, aboard Lord Jason Mallister's ships, in order to ask for Howland Reed's assistance against the ironborn. Lord Jason points out it will be very difficult to find the castle among the swamps, also because it moves around. Robb tells him to fly the Starks' banner, and the crannogmen will find him.
According to The World of Ice and Fire, no raven or enemy can reach Greywater Watch, because it is said to be constantly moving.
Bear Island · Last Hearth · Karhold · The Dreadfort · Winterfell (Winter town) · Deepwood Motte · Torrhen's Square · Castle Cerwyn · Hornwood · Ramsgate · Widow's Watch · Barrowton · White Harbor · Oldcastle · Moat Cailin · Flint's Finger · Greywater Watch · Rillwater Crossing · Ironrath · Highpoint
|Rivers and Lakes:|
|Lord:||Lord Howland Reed||Heir:||Meera Reed|
|Seat:||Greywater Watch||Lands:||The Neck, The North|
|Title(s):||Lord of Greywater Watch|
|Deceased members:||Jojen Reed|