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1997 Map of Mount Saint Helena

Name: 1997 Topographic Map of Mount Saint Helena
Creator: U.S. Geological Survey
Published: 1998
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1998

About this map

Mount Saint Helena dominates the high ground of the Mayacmas Mountains on this late 20th-century survey, a landscape defined by its geothermal activity and deep mining history. The map documents numerous historic workings such as the Chicago Mine, Helen Mine, and Wall Street Mine, tucked into the drainages of Big Sulphur Creek and Appletree Creek. These industrial sites sit in contrast to the preserved lands of the Robert Louis Stevenson State Park, which encompasses the mountain's summit and the neighboring Sacre Gap.

Tracing the complex boundaries of the Knights Grant and the Mallacomes or Moristul land grants, the map reveals a history of land tenure that predates the modern county lines of Sonoma and Lake counties. Small pockets of development like Oakridge and the Middletown Rancheria appear alongside evidence of earlier habitation, including the Locke Cabin (Site). The prevalence of geothermal wells in the northwest corner highlights the area's continued role as an energy resource center.