The Trident is one of the largest and most well-known rivers on the continent of Westeros. Technically it is three rivers which flow into one another just before they reach the Narrow Sea, several hundred miles north of King's Landing.
The Trident River is the most extensive river network on the continent of Westeros. It flows out of the hills and low mountains of the eastern Westerlands and the bogs of the Neck into the Narrow Sea. It consists of three major branches, from south to north: the Red Fork, the Blue Fork, and the Green Fork. The three main rivers of the Trident and their numerous smaller tributaries give the Riverlands their name.
Forks of the Trident
The Red Fork
The longest branch rises in the Westerlands and flows north to a confluence with its tributary, the Tumblestone, which flows from the northwest. The House Tully castle of Riverrun is located where the two rivers meet. The Red Fork then flows east through the center of the Riverlands to where it joins the main body of the Trident. The lands along the Red Fork of the Trident are located in the very heart of the entire continent of Westeros.
The Blue Fork
The Green Fork
The Green Fork starts in the bogs of the Neck, technically within the southern borders of the North. The river flows south, crossing the border into the Riverlands, and then past the two towers of the castle known as the Twins, the seat of House Frey. It flows south-east for several hundred more miles before reaching the main body of the Trident. Just before that confluence is the Ruby Ford, where the Battle of the Trident during Robert's Rebellion was fought and where Robert Baratheon slew Rhaegar Targaryen in combat. The ford is named for the rubies that ornamented Rhaegar's breast plate that were said to have been scattered in the river when he was killed by Robert's war hammer.
In the books
In the A Song of Ice and Fire novels, the Trident is the same. The Tumblestone is a tributary of the Red Fork that flows from the north out of the Westerlands and joins the Red Fork coming up from the south at Riverrun. For much of its length the Red Fork is meandering and slow-moving, with frequent sandbars and islets. There are fords a few miles south of Riverrun and another ford, known as the Mummer's Ford, further east.
The books haven't made clear what the proper name of the river is for the brief part of its run east of where all three forks merge, but before it enters the ocean. It may be known simply as "the Trident" at this point, but as with several rivers in real life, one of the three branches may be considered the main river, i.e. how the Ohio River is a tributary of the Mississippi River, but the waters below where they join are considered to be "the Mississippi" and not a new river. Such nomenclature is often based on local factors, i.e. the riverbed of the lower Mississippi more closely matches the riverbed of the upper Mississippi than the river bed of the Ohio, etc. Its possible, due to vague references that the Battle of the Trident at Ruby Ford was fought "on the Green Fork of the Trident", that the Green Fork of the Trident is considered to be the one which flows all the way to the ocean.
The headlands of the Green Fork are allegedly close to the location of the mysterious Greywater Watch, the seat of House Reed.
Seagard · Wendish Town · Fairmarket · Riverrun · The Twins · Harrenhal · Raventree Hall · Stone Hedge · Crossroads Inn · High Heart · Acorn Hall · Maidenpool · Pinkmaiden · Stoney Sept · Pennytree · Saltpans · Lord Harroway's Town
|Rivers and Lakes:|