1. Rio Grande: This river forms the border between Texas and Mexico and is the fourth longest river in North America.
2. Rio Medina: This river flows through the Texas Hill Country and is known for its cypress trees and clear water.
3. Nueces River: This river originates in the Edwards Plateau and flows through South Texas to the Gulf of Mexico.
4. San Antonio River: This river flows through the city of San Antonio and is a popular spot for tubing and fishing.
5. Guadalupe River: This river originates in the Texas Hill Country and flows through Central Texas to the Gulf of Mexico.
6. Colorado River: This river originates in the Rocky Mountains in Colorado and flows through Central Texas to the Gulf of Mexico.
7. Brazos River: This river originates in the Llano Estacado region of West Texas and flows through Central Texas to the Gulf of Mexico.
8. Trinity River: This river originates in the Dallas-Fort Worth Metroplex and flows through East Texas to the Gulf of Mexico.
9. Neches River: This river originates in East Texas and flows through the Piney Woods region to the Gulf of Mexico.
10. Sabine River: This river forms the border between Texas and Louisiana and flows through the Piney Woods region to the Gulf of Mexico.