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1996 Map of Tassajara

Name: 1996 Topographic Map of Tassajara
Creator: U.S. Geological Survey
Published: 1999
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1999

About this map

The Black Hills and Morgan Territory dominate this terrain on the southern edge of Mount Diablo State Park, revealing a landscape where ranching roots and early education centers once flourished. The map identifies specific evidence of a fading rural infrastructure through entries like the Tassajara Sch (Abandoned) and Highland Sch (Abandoned), pointing to former community nodes along the winding creek beds and canyon floors.

Settlement patterns follow the natural drainages of Marsh Creek and Cayetano Creek, while the presence of the Cañada De Los Vaqueros and Round Valley highlights the transition from traditional land grants to public preserves. The network of unimproved roads and family-named landmarks like Windy Pt and Oyster Pt underscores the area's history before the late-twentieth-century residential expansion of the surrounding Contra Costa and Alameda counties reached these foothills.