​The Nueces
​River

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Marker Text:​Until 1836 this river formed the undisputed western boundary of Texas. By the Treaty of Guadalupe Hidalgo, signed in February, 1848, the boundary line between Mexico and the United States was fixed at the Rio Grande. (1936) 

Marker No: 8135

Gray Granite 1936 Centennial Marker 

Geographic: ​28° 25.366′ N, 99° 14.705′ W

Location: 0.5 mile south on I35B, Cotulla