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1969 Map of Slack Canyon

Name: 1969 Topographic Map of Slack Canyon
Creator: U.S. Geological Survey
Published: 1973
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1973

About this map

The San Andreas Rift Zone dominates this 1969 topographic study, cutting a distinctive path through the borderlands of Monterey and Fresno counties. The landscape is defined by parallel valleys and steep canyons, with Peachtree Valley and Indian Valley serving as the primary corridors for movement through the region. This is a terrain of scattered water sources and isolated settlements, where survival and travel historically relied on the network of springs like Bitterwater Spring, McMillan Spring, and Splitrock Spring.

The presence of the Slack Canyon Conservation Camp and the small settlement at Hewitt indicate the light human footprint on this complex geology. Surveyed in the late 1960s, the map documents a network of unpaved routes, including the Peachtree Road and various jeep trails that navigate the drainages of San Lorenzo Creek and Slack Canyon. This detailed view captures the remote character of the California Coast Ranges before modern expansion changed the regional infrastructure.