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1921 Map of Triunfo Pass, 1928 Print
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1921 Map of Triunfo Pass

USGS Topo · Published 1928

About this map

Santa Monica Mountains dominate this coastal survey, where the steep topography of the Malibu shoreline meets the high peaks of Boney Mountain and Sandstone Pk. This 1920s landscape reveals the early transit patterns of coastal Ventura and Los Angeles counties, centered on the historic Triunfo Pass and the isolated settlement of Newbury Park. The map documents a network of canyons that carve through the range toward the Pacific Ocean, including Sycamore Canyon and Zuma Canyon, alongside the inland pastoral expanses of Conejo Valley and Russell Valley. Inland, small hubs like Triunfo and Cornell mark the limited development of the era, while the San Bernardino Base Line provides a fixed surveying reference across the complex terrain. The sharp distinction between the coastal canyons and the northern Simi Hills illustrates the geographic barriers that defined local travel before modern highway expansion.

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Map Details

Date Portrayed1921
Date Published1928
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:62,500
Physical Dimensions16.6 x 19.8 inches

Editions of this 1921 Triunfo Pass Map

Historical Maps of Thousand Oaks Through Time

237 maps found

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain