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1897 Map of Mt. Hamilton, 1906 Print
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1897 Map of Mt. Hamilton

USGS Topo · Published 1906

About this map

Lick Observatory crowns the summit of Mt. Hamilton, anchoring a landscape of complex ridge systems and secluded valleys at the turn of the century. This survey, conducted by R. B. Marshall, captures the Diablo Range during a period when the mountainous interior of Santa Clara and Alameda counties remained largely undeveloped, characterized by cattle ranching and early scientific exploration. Travel through this terrain relied on a network of winding roads and trails connecting points like the Hotel and remote outposts such as Mowry Camp. The map details a rugged topography defined by Oak Ridge, Valpe Ridge, and Mason Ridge, with deep drainages like Arroyo Mocho and Smith Creek carving through the slopes. Local landmarks like Ingram Flat and Blackbird Valley reflect the small-scale human footprint within the broad expanse of Isabel Valley and San Felipe Valley.

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Map Details

Date Portrayed1897
Date Published1906
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:62,500
Physical Dimensions16.6 x 19.9 inches

Editions of this 1897 Mt. Hamilton Map

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain