The river that forms the southernmost boundary of Texas is the Rio Grande. It flows along the border between Texas and Mexico, stretching approximately 1,885 miles from its source in the San Juan Mountains of Colorado to the Gulf of Mexico. The Rio Grande serves as a natural border, playing a significant role in the geography and politics of the region.
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the Rio grande river
The Orange River
The Rio Grande River
Rio Grande.
Rio Grande.
Rio Grande
Río Grande del Norte
The Rio Grande
The Paraná River
The Rio Grande
The Mississippi river forms the boundary between Missouri and Illinois!