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1959 Map of Chilao Flat

Name: 1959 Topographic Map of Chilao Flat
Creator: U.S. Geological Survey
Published: 1986
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1986

About this map

Monte Cristo Mine and several other prospecting sites like the Falcon Mine and Black Cargo Mine dot the high elevations of the Angeles National Forest in this late-1950s survey. The map records a landscape where recreation and resource extraction meet, shown by the proximity of the Mill Creek Picnic Grounds and numerous campgrounds to working cattle operations like the Loomis Ranch and Newcomb Ranch.

The presence of the Barley Flats Military Reservation, complete with a Heliport, indicates the strategic value of these peaks during the Cold War. Transportation across the steep terrain is dominated by the Angeles Crest Highway, which links various service hubs including the Red Box Station and the State Highway Maintenance Sta. Notable topographic features such as Strawberry Peak and Vetter Mountain overlook deep drainages like Big Tujunga Canyon and the West Fork San Gabriel River.