I assume you're referring to the Potomac.
the river that runs through the U.S. capitol is the Potomac river.
The area of Capitol Reef, in south-central Utah, was named for a line of white cliffs and domes of Navajo Sandstone, which resembled the US Capitol building. This formation runs from the Freemont River to Pleasant Creek on the Waterpocket Fold.
Mississippi River
The Mississippi?
Potomac The River Runs Through Us - 2013 was released on: USA: April 2013
Mississippi
There are 100 senators in the us capitol!
The Capitol of the United States of America is Washington D.C.
the St Lawrence River mouth
Wyoming's people wanted it to look like the US. capitol; it was designed that way(:
Rio Grand
The Colorado River of Texas (not to be confused with the US Colorado river which flows through the Grand Canyon and empties the Sea of Cortez).