International Boundary Marker No. 1, U.S. and Mexico, Boundary marker in Doña Ana County, United States.
The International Boundary Marker No. 1 is a boundary monument between Mexico and the United States located near Sunland Park in New Mexico. It consists of a tall stone pillar with a square base that marks the western land section of the international border.
The marker was installed in 1855 by the Emory-Salazar Commission following the remeasurement of the region after the Mexican-American War. It is part of a historical series that established the new boundaries defined by the Treaty of Guadalupe Hidalgo.
The marker bears inscriptions in English and Spanish, reflecting the lasting territorial agreement between the two nations. These bilingual markings show how both countries documented their shared boundary in written form.
The monument is located near Sunland Park and remains visible and accessible from the nearby roads. Access is easiest via McNutt Road in the southern section of the area.
The monument is part of a series of around 276 markers spanning the entire western border. It was restored in 1966 and received a concrete foundation platform during that refurbishment for added stability.
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