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The Potomac River is a waterway that traverses through Appalachia and the Capital Wasteland.[1]


By 2277 the river's flow in the Capital Wasteland seems to have mostly ceased, as the entire region is arid. The mostly dry riverbed has pockets of moderately radioactive water and is filled with detritus. Mirelurks make their home where the river has water, and those are hunted by the locals for food. After the activation of Project Purity, its Tidal Basin will fill with clean pure water, resulting in the Brotherhood having to clear out the mirelurk corpses washing ashore.


The river starts its flow from two locations, its North Branch in West Virginia and its South Branch in Virginia. After the two branches meet, the Potomac flows as the border between the Eastern and Columbia Commonwealths, and the states of West Virginia, Virginia, Maryland and the District of Columbia, until it reaches Chesapeake Bay. Its waters flow into the Tidal Basin, and just past this, the Anacostia River merges with the Potomac.

Where the river flows just north of DC to the end of the map the river is full.



The Potomac River appears in Fallout 3 and Fallout 76.

See also


  1. The Lone Wanderer: "Where is Arefu?"
    Lucy West: "Arefu is northwest of Megaton on an old overpass over the Potomac. If you follow what's left of the river, you can't miss it."
    (Lucy West's dialogue)
  2. Shelters Claim Center terminal entries; Shelters Claim Center terminal; Communications Logs; Re: Moving on - 12/01/2077
  3. The Lone Wanderer: "I have a collection of pennies with Lincoln's face on them."
    Leroy Walker: "Not exactly something that will rally slaves, eh? I'll give you 15 caps for it."
    The Lone Wanderer: "You'll have to do better than that."
    Leroy Walker: "Sure, why not. Hmm. Can't burn pennies. I'll have to toss them into the Potomac."
    (Leroy Walker's dialogue)
  4. Shawna: "Dave is a world-renowned marksman, known for shooting an apple out of the hand of a Raider from across the Potomac."
    (Shawna's dialogue) Note: This line is a part of the tour given in the Museum of Dave.