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How long is the Rio Grande from the San Juan Mountains to the Gulf of Mexico?
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Rio Grande
The Rio Grande basin and its drainage network.
The Rio Grande has a total length of approximately 1,900 miles (3,060 km) from its source in the San Juan Mountains to the Gulf of Mexico.12
Its course includes the following segments:
* 175 miles (280 km) through Colorado1
* About 470 miles (760 km) across New Mexico1
* About 1,240 miles (2,000 km) forming the border between Texas and Mexico1