The Rio Grande River forms the southwestern border of Texas, separating it from Mexico.
Rio grande
Bordering Texas and Louisiana is the Sabine River, the Red River borders Texas and Oklahoma, and between Texas and New Mexico/Mexico is the Rio.
the northeast border of Texas is the red river
The Red River forms Oklahoma's southern border with Texas.
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 Rio Grande river is the river that is on the western border of Texas.
The Red River.
red river
red river
Pecos
the Rio Grande river