Mount Diablo meridian

Summit beacon tower atop Mt. Diablo. The initial point marker lies within this tower.

The Mount Diablo Meridian, established in 1851, is a principal meridian extending north and south from its initial point atop Mount Diablo in California at W 121° 54.845. Established under the U.S. Public Land Survey System, it is used to describe lands in most of northern California and all of Nevada.[1] Mount Diablo also marks the baseline at latitude 37°52′54″N.[2]

Mount Diablo Memorial Marker
  1. ^ *John W. Pettley, PLS. "Mount Diablo Survey Point Establishes Property Boundaries in California and Nevada". Mount Diablo Surveyors Historical Society. Retrieved 2012-09-27.
  2. ^ *"Mount Diablo Meridian". U.S. Bureau of Land Management. Archived from the original on 2017-01-06. Retrieved 2012-09-27.