Initial Point of Boundary Between U.S. and Mexico
Initial Point of Boundary Between U.S. and Mexico, Boundary marker at Mexico-United States border, San Diego County and Tijuana
The white marble obelisk stands 20 feet tall at the westernmost point of the international border between Mexico and the United States.
In 1851, this monument arrived by ship around Cape Horn from New York, marking the starting point defined by the Treaty of Guadalupe Hidalgo.
The monument features an inverted acorn on top, incorporating California live oak symbolism into the international boundary designation.
Modern border fencing stands several feet north of the marker, making the monument primarily accessible from the Mexican side in Playas de Tijuana.
The marker represents the initial survey point from which the entire 1,954-mile Mexico-United States border extends eastward to the Gulf of Mexico.
Location: San Diego County
Location: Tijuana
Part of: Mexico–United States border, Friendship Park
Website: https://buildthatpark.org
GPS coordinates: 32.53445,-117.12279
Latest update: March 5, 2025 18:20
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