Its the Columbia River.
The Columbia River borders most of the length between Washington & Oregon.
The Columbia River separates Washington State and Oregon.
The Northern Border is marked by the northern edges of the United States, including states like Washington, Montana, North Dakota, and Minnesota. Various geographical features such as rivers, mountain ranges, and lakes run along this border, providing natural boundaries between the U.S. and Canada.
The capital city of the u.s.a Washington, D.C. Is located between with two states
That river would be the mighty Columbia.Roll on Columbia, roll on!
If you mean the Columbia River along the Oregon/Washington border, The river rises in the Rocky Mountains in British Columbia, Canada, flows northwest and then south into the U.S. state of Washington, then turns west to form most of the border between Washington and the state of Oregon before emptying into the Pacific Ocean.
Washington (part), Idaho, Montana, North Dakota, and Minnesota (part).
The Rio Grande River flows along the border of Mexico and the United States of America. It flows along the border of Texas.
Argentina and Paraguay are found along Brazil's southwestern border.
The Alborz Mountains run along Iran's northern border and trace the edge of the Caspian Sea.
YES. The northeastern border of Nepal is along the southwestern border of China.
Lowlands are found along the border.