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1962 Map of Illinois Hill

Name: 1962 Topographic Map of Illinois Hill
Creator: U.S. Geological Survey
Published: 1981
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1981

About this map

Mining operations and rugged foothills define this Mariposa County landscape during the early 1960s. The map reveals a high concentration of gold-era activity, evidenced by the Great Northern Mine, Pocahontas Mine, and the Klondike Mine nestled near Illinois Hill. These sites, along with the San Jose Mine and Goodview Mine further south, reflect a legacy of extraction that shaped local geography long before modern photogrammetric mapping.

Settlement patterns are sparse, anchored by the community of Ganns and the high-elevation White Rock Fire Control Sta. Water management is central to the terrain, with Mariposa Creek feeding into the Mariposa Reservoir, while named drainage systems like Deadman Creek and Dutchman Creek carve through the ridges. For genealogists and local historians, the White Rock Cem and a solitary Grave near Raynor Creek offer specific points of interest amidst the network of primitive routes such as White Rock Road and various unnamed Jeep Trails.