After beginning in the western hills, the Tumblestone flows east into the Red Fork of the Trident. Riverrun sits at the confluence, with the castle's Water Gate opening on the Tumblestone. The nearest ford is leagues upriver from Riverrun. A swift river, the Tumblestone is much deeper than the placid Red Fork.
A Game of Thrones
Ser Jaime Lannister establishes three camps during his siege of Riverrun. During the Battle of the Camps, the Lannister camp on the northern shore of the Tumblestone is attacked by Ser Brynden Tully. Lord Andros Brax drowns while trying to cross the river to aid the Lannister camp.
A Clash of Kings
In preparation for the Battle of the Fords, the Darrys, Paeges, and Pipers set up camp north of the Tumblestone, while the Blackwoods establish themselves between the Tumblestone and the Red Fork. When Tyrion Lannister's spies attempt to free Jaime from captivity at Riverrun, Ser Edmure Tully is wenching north of the river.
A Storm of Swords
A Feast for Crows
Ser Ryman Frey establishes his large and disorderly camp north of the Tumblestone during the siege of Riverrun. Jaime, the Lord Commander of the Kingsguard, threatens Edmure that he will destroy Riverrun and divert the Tumblestone over its ruins if the castle is not yielded.
Catelyn watched from the battlements, waiting and watching as she had waited and watched so many times before. Beneath her, the swift wild Tumblestone plunged like a spear into the side of the broad Red Fork, its blue-white current churning the muddy red-brown flow of the greater river. A morning mist hung over the water, as thin as gossamer and the wisps of memory.—thoughts of Catelyn Stark
- The World of Ice & Fire, The Riverlands.
- The World of Ice & Fire, The Westerlands.
- George R. R. Martin's A World of Ice and Fire, Tumblestone.
- A Game of Thrones, Chapter 63, Catelyn X.
- A Storm of Swords, Chapter 35, Catelyn IV.
- A Feast for Crows, Chapter 38, Jaime VI.
- A Storm of Swords, Chapter 3, Arya I.
- A Storm of Swords, Chapter 2, Catelyn I.
- The World of Ice & Fire, House Tully.
- A Game of Thrones, Chapter 69, Tyrion IX.
- A Clash of Kings, Chapter 45, Catelyn VI.
- A Clash of Kings, Chapter 39, Catelyn V.
- A Storm of Swords, Chapter 45, Catelyn V.
- A Feast for Crows, Chapter 33, Jaime V.