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1958 Map of Clearlake Highlands

Name: 1958 Topographic Map of Clearlake Highlands
Creator: U.S. Geological Survey
Published: 1961
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1961

About this map

Clear Lake defines the northern landscape of this 1950s survey, its waters meeting an intricate shoreline of points and bays including Monitor Pt and Jago Bay. The growing communities of Clearlake Highlands and Clearlake Park occupy the eastern shore, marked by a detailed grid of streets like Olympia Ave and Austin Ave. This era captures the region's mid-century recreational character, featuring the Drive-in Theatre near Burns Valley Sch and specialized destinations like Salminas Resort and Mt Hannah Lodge.

South of the main lake, the terrain rises toward volcanic features such as Mt Hannah and Seigler Mtn, while Thurston Lake sits isolated amidst the hills. Aviation infrastructure is visible at both Hobergs Airport and Pearce Airport, serving the remote resorts of the era. The presence of Borax Lake and the Sulphur Bank ridge highlights the unique geological and geothermal history of this corner of Lake County.