Was the Rio Grande "Discovered"? No—Known to Indigenous Peoples for Millennia

The Rio Grande (Río Bravo del Norte) was never "discovered" by Europeans—it was the lifeline of Pueblo, Coahuiltecan, Jumano, Apache, Comanche and other nations for thousands of years.

• First European record: 1540, Francisco Vázquez de Coronado expedition (seeking Cíbola).
• First mapping: 1598, Juan de Oñate colonization of New Mexico.
• Name: "Río Grande" (Spanish) / "Río Bravo" (Mexican) — both descriptive, not honorific.

The river forms 1,250 mi of the US–Mexico border; total length ~1,900 mi (3,060 km). Its "discovery" is a colonial framing—Indigenous knowledge long preceded European documentation.