Qualla: Rio Grande

Rio Grande: Introduction

Fri, 30 Jan 2026 00:00:00 GMT

Photo credit Jerry R. DeVault KSUJD, CC BY-SA 2.5. In mid-2001, a sandbar formed at the mouth of the Rio Grande, and for the first time in recorded history, the river failed to empty into the Gulf of Mexico. Workers dredged the obstruction. It reformed almost immediately. This was not a freak event but a symptom: the Rio Grande is over-appropriated, meaning more people claim rights to its water than the river actually carries. Only twenty percent of its flow reaches the sea. The fourth longest river in the United States -- known as the Rio Bravo del Norte in Mexico, and To Ba'aadi in Navajo -- rises in Colorado's San Juan Mountains and traces a path through deep gorges, ancient pueblos, desert cities, and international borders before arriving, often exhausted, at the Gulf. Two nations, three U.S. states, and several Mexican states depend on its water. There is not enough for all of them.

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Image: Jerry R. DeVault KSUJD | CC BY-SA 2.5

Rio Grande: Born in the San Juans

Fri, 30 Jan 2026 00:00:00 GMT

Photo credit B575, CC BY-SA 3.0. The Rio Grande forms at the base of Canby Mountain in Colorado's San Juan Mountains, just east of the Continental Divide. From there it flows through the San Luis Valley and south into New Mexico, where it carves through the Rio Grande Gorge near Taos -- a dramatic volcanic rift ...

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Image: B575 | CC BY-SA 3.0

Rio Grande: Thirteen Million Years in the Making

Fri, 30 Jan 2026 00:00:00 GMT

Photo credit CC BY-SA 2.5. The sedimentary basins forming the modern Rio Grande Valley were not always connected. For millions of years, the basins created by the Rio Grande rift were isolated bolsons -- closed depressions with no external drainage, each containing a central playa lake that evaporated as f...

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Image: CC BY-SA 2.5

Rio Grande: Conquest and Commerce

Fri, 30 Jan 2026 00:00:00 GMT

Photo credit (WT-en) Mrkstvns at English Wikivoyage, CC BY-SA 1.0. A Spanish naval expedition first charted the Rio Grande's mouth in 1519. In 1540, Francisco Vasquez de Coronado led an expedition from Nueva Galicia to the Tiwa pueblos along the river. On July 12, 1598, Don Juan de Onate established the colony of Santa Fe de Nuevo Mejico at the ...

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Image: (WT-en) Mrkstvns at English Wikivoyage | CC BY-SA 1.0

Rio Grande: The Water Wars

Fri, 30 Jan 2026 00:00:00 GMT

Photo credit Asaavedra32, CC BY-SA 3.0. The modern story of the Rio Grande is a story of scarcity. The 1905 Rio Grande Project divided the river's waters between New Mexico and Texas and allocated a portion to Mexico -- the first time Congress directed the allocation of an interstate river. The 1938 Rio Grande Compact,...

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Image: Asaavedra32 | CC BY-SA 3.0

Rio Grande: A River Still Setting Terms

Fri, 30 Jan 2026 00:00:00 GMT

Photo credit Scott Hazdra, CC BY-SA 3.0. Portions of the Rio Grande in New Mexico and Texas are designated as Wild and Scenic River, a federal protection that feels almost ironic given how thoroughly the rest of the waterway has been dammed, diverted, and depleted. Eight major dams punctuate its length: Rio Grande Dam, ...

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Image: Scott Hazdra | CC BY-SA 3.0