The Blackwater Rush, also called the Blackwater or River Blackwater, is a significant river of Westeros. It flows out of the hills and valleys of the Westerlands and proceeds eastwards for several hundred miles before flowing into Blackwater Bay. The city of King's Landing overlooks the mouth of the Blackwater. A tributary of the Blackwater feeds the lake of Gods Eye to the north.
The town of Stoney Sept is located not far from its headwaters.
In the books
In A Song of Ice and Fire, the Blackwater forms the boundary between the Crownlands, Westerlands, Reach and Riverlands. King's Landing, the capital city of the Seven Kingdoms, is built on the mouth of the Blackwater where it enters Blackwater Bay.
In the computer game
In the Game of Thrones computer roleplaying game, the Blackwater's source is located at a castle and town called Riverspring, located inside the borders of the Westerlands. It is held by House Sarwyck.
|Settlements:||The Twins · Seagard · Wendish Town · Fairmarket · Riverrun · Raventree Hall · Stone Hedge · Crossroads Inn · High Heart · Acorn Hall · Maidenpool · Pinkmaiden · Stoney Sept|
|Rivers and Lakes:||The Trident · Blackwater Rush · Gods Eye|
|Geographic Features:||The Neck · Ironman's Bay · Cape of Eagles · Whispering Wood · Isle of Faces · Hollow Hill|
|Regional Capital:||King's Landing (Red Keep · Great Sept of Baelor · Guildhall of the Alchemists · Flea Bottom · Mud Gate)|
|Settlements:||Antlers · Rosby · The Whispers · Claw Isle · Dragonstone (castle) · Driftmark · Sharp Point · Stonedance|
|Geographic Features:||Blackwater Rush · Blackwater Bay · Crackclaw Point · Claw Isle · Dragonstone (island) · Driftmark · The Kingswood|