2016 Map of Mouth of Rio Grande

About this map

The Mouth of Rio Grande marks the southernmost extremity of the Texas coast, where the river meets the Gulf of Mexico along the international border with Mexico. This 2016 survey shows a landscape of low-lying coastal prairie and tidal flats characterized by numerous lomas—small, elevated clay dunes—including Loma de la Estrella and Loma de los Ebanitos. The small settlement of Kopernik Shores sits near Mesa del Gavilan, accessed via Boca Chica Blvd, which terminates at the sandy stretch of Boca Chica Beach. The serpentine path of the Rio Grande creates distinct features like Tarpon Bend, illustrating the dynamic nature of the river as it winds toward the sea. To the west, the Port Isabel Reservoir and the community of Monica provide a glimpse into the local infrastructure and residential layout of this unique borderland environment.