uutu
The Columbia River borders most of the length between Washington & Oregon.
the columbia borders washington and oregon
Columbia River
The Columbia River
The Columbia River
The Columbia River
The Columbia River
The Columbia River
Columbia
The state that borders both Washington, D.C., and the Potomac River is Maryland. The river serves as a natural boundary between D.C. and Maryland, along with parts of Virginia. This location allows for significant interaction between the District and its neighboring states.
Columbia river
The Ohio River forms the southern borders of Ohio and Indiana.