The major waterways in the interior plains of North America include the Missouri River, Mississippi River, and Red River. These rivers are vital for transportation, agriculture, and wildlife habitats in the region.
The Colorado River.
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Arkansas river
The major rivers in the north central plains region of Texas are Red River, Sabine River, Trinity River, Brazos River and Colorado River.
The Sea of Cortez.
The Missouri River is longer, but may be considered a tributary to the Mississippi River, which drains much of the eastern interior of the US.
Interior Plains
The common name for the plains that are located in the central area of the lower 48 states are is "The Great Plains". However, the Great Plains are just part of the even larger area of the interior plains that stretch from the Mississippi River to the Rocky Mountains.
The region is the Great Plains but the state would be Colorado
rain, the river Colorado wearing the plains