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1993 Map of Mark West Springs

Name: 1993 Topographic Map of Mark West Springs
Creator: U.S. Geological Survey
Published: 1993
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1993

About this map

The Petrified Forest stands as a focal point in this portion of Sonoma County, nestled within a landscape defined by volcanic geology and steep drainages. To the north, Knights Valley and the historic Mallacomes or Moristul y Plan de Agua Caliente land grant transition into the high ridges of Chalk Mtn and Bell Mtn. The map documents a rural infrastructure centered on the winding Petrified Forest Road and St Helena Road, where local life clustered around the Franz Valley School.

Water systems define the local geography, with Mark West Creek and its many tributaries, including Humbug Creek and Porter Creek, carving through the Bald Hills. The presence of the Mark West Springs settlement and various pumping stations suggests a long history of water resource management and resort culture in this mountainous terrain. From the deep ravine of Devils Kitchen to the heights of Telegraph Hill, the map captures the complex topography before late-century development intensified.