Rio Grande forms some of the border.
The Rio Grande forms part of the US border with Mexico, while the St. Lawrence River forms part of the border between the US and Canada.
Rio Grande forms the Southern border of the United states.
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The St. Lawrence River.
Yes, the Rio Grande forms part of the US border. So does the St. Lawrence.
The Rio Grande, Spanish for grand river, forms the southern border of the United States, but it only forms the border between Texas and Mexico. New Mexico is not bordered by the Rio Grande, for example, but rather the Rio Grande runs through New Mexico.The only river that partially forms the southern border of the U.S. is the Rio Grande on the Texas/Mexico border.The rest of America's souther border with Mexico is a land border in souther New Mexico, Arizona, & Colorado.
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the Rio Grande.