International Border Markers between the United States (California) and Mexico . Information compiled from USGS topographic maps and color image maps (infrared aerial photography).
WARNING: These markers are not part of a public park or trail system. Do not attempt to survey these sites without researching property and access issues for each site. Contact the US Border Patrol if hiking near sensitive surveillance areas. Many markers are remote and on rugged terrain. Some markers are in vehicle-restricted areas, while other markers are isolated from roads or trails by aqueducts and are not readily accessible from the United States. Take precautions and use good judgment to ensure your safety.
Inaccuracies may exist and conditions may change. User assumes all risk associated with the use of this information, its data, and any file download made available here.