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Contra Costa County Urban Limit Line Renewed We won a 70 percent Yes on A landslide victory to renew Contra Costa County’s Urban Limit Line! A big thank you to…

On June 9, the California Senate Natural Resources & Water Committee will consider Assembly Concurrent Resolution 107 (ACR 107), recognizing the critical conservation importance of the Diablo Range. After successfully…

This June Election, Vote to Renew Our County Urban Limit Line! A Yes on A vote to renew our Urban Limit Line Protects our beautiful open space Defends our homes…

The Del Puerto Water District entirely ignored threats to wildlife and Del Puerto Creek that would be caused by their proposed project. Over the holidays, the Del Puerto Water District…

Save Mount Diablo Supports Key Open Space Protection Tool In a win for open space protection, in early December the Contra Costa County Board of Supervisors approved sending a measure…

Despite Objections from the City of Dublin, Judge Finalizes Decision, Defending Open Space between Dublin and Livermore DUBLIN, CA—After a hearing on the tentative decision on November 13, 2025, at…

Recently, Save Mount Diablo has made great progress helping our good partner California State Parks advance its land acquisition efforts. Consider the following examples from this year. On October 13th,…

By Steven dePaschalis and Seth Adams In the rolling eastern hills of Alameda County, California, Altamont Pass is a natural divide between two worlds: the fertile, urbanized Livermore Valley to…

Dublin and Land Speculator/Developer Crosby Attempt to Relitigate Case DUBLIN, CA—The City of Dublin and developers have filed an objection to our legal victory over Dublin Measure II. We’ll respond…

Judge Blocks City of Dublin Measure II from Breaking the Dublin Urban Limit Line and Violating the Greenbelt between Dublin and Livermore The Successful Legal Challenge Was Filed by Save…