Cross-border linkages between the United States and Mexico are an international conservation priority. EHL is working to save the La Posta linkage in San Diego from ill-conceived development.



Along the border with Baja California, much connectivity has been lost due to the sprawl of metropolitan Tijuana. Further to the east, around the San Diego town of Campo, the Conservation Biology Institute has identified a landscape level linkage around the La Posta Valley, which can connect the Peninsular Ranges on both sides of the border and also preserve an ecologically important coastal-desert transition zone. 

Over a dozen development projects, estate lot subdivisions, and mining operations now threaten the linkage. Besides tracking these projects and filing comments under CEQA, EHL is seeking to protect these lands via the “2020” General Plan update. We are also working with The Nature Conservancy in its efforts to marshal funds and acquire key properties.