The Red River
Columbia River
The Red River.
The Columbia River
Columbia
The Red River.
The Columbia River
The Columbia River
The Columbia River
The Red River.
The Columbia River
The River that forms a border between Oklahoma and Texas is the Red River. The river was named for the red-bed country of its watershed.
The two rivers that form a natural border between Paraguay and Argentina are the Paraná River and the Paraguay River. The Paraná River lies to the east and serves as a significant boundary, while the Paraguay River flows along the western side of Paraguay, separating it from Argentina. Together, these rivers define much of the border between the two countries.