The Rio Grande, the Red River and the Sabrine apparently :)
the northeast border of Texas is the red river
The Red River (Mississippi River) forms a border between Texas and Oklahoma. It is a short border between Texas and Arkansas before entering Arkansas, turning south near Fulton, Arkansas and flowing into Louisiana. The total length of the river is 1,360 miles (2,190 km).
It is the southern border for Texas; conversely, it is the northern border for Mexico.
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 Yalu River and the Tumen River form the northern border of North Korea.
The Rio Grande river is the river that is on the western border of Texas.
The Yalu River and the Tumen River form the northern border of North Korea.
the northeast border of Texas is the red river
Much of the border between Oklahoma and Texas is the Red River.
the Ohio River
Oklahoma shares most of Texas's northern border.