San Ramon and Danville anchor this 2012 survey, illustrating the dense suburban expansion into the foothills of the Diablo Range. The transition from established residential communities like Alamo Oaks and Green Valley to the planned luxury developments of Blackhawk is clearly visible. The landscape is defined by its deep canyons and ridges, including Emmons Canyon and Black Hawk Ridge, which separate the residential valleys from the higher peaks of the northern range.
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This is the sole edition of this map. No revisions or reprints were ever made.
1896 · Mt. Diablo
USGS Topo · 1:62,500
1897 · Concord
USGS Topo · 1:62,500
1898 · Mt. Diablo
USGS Topo · 1:62,500
1899 · Haywards
USGS Topo · 1:62,500
1906 · Pleasanton
USGS Topo · 1:62,500
1915 · Haywards
USGS Topo · 1:62,500
1915 · Concord
USGS Topo · 1:62,500
1916 · Lone Tree Valley
USGS Topo · 1:31,680
1941 · Pleasanton
USGS Topo · 1:62,500
1942 · Concord
USGS Topo · 1:62,500