Loading map...

1955 Map of Castle Rock Ridge

Name: 1955 Topographic Map of Castle Rock Ridge
Creator: U.S. Geological Survey
Published: 1970
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1970

About this map

The San Andreas Rift Zone creates a striking diagonal rift through the center of this terrain, following the spine of the Santa Cruz Mountains. This geological feature dictates the local drainage patterns and creates the pockets of water found at Lake Ranch Reservoir and the Howell Reservoirs. The map records a transition from the developing residential areas near Saratoga and Villa Montalvo in the northeast to the more isolated mountain outposts and camps to the southwest.

Remote landmarks such as Uncle Billys Cabin and Grizzly Rock contrast with institutional footprints like Alma College and the Montezuma School. Transport is defined by the winding path of Skyline Boulevard along the ridge, while the community of Boulder Creek anchors the southwestern corner. Natural features like Castle Rock Falls and the jagged outcrops of Summit Rock and Goat Rock highlight the varied topography of what is now Castle Rock State Park.