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1970 Map of San Gorgonio Mtn

Name: 1970 Topographic Map of San Gorgonio Mtn
Creator: U.S. Geological Survey
Published: 1988
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1988

About this map

San Gorgonio Wilderness and its high-elevation terrain dominate this landscape, which was updated in 1988 to reflect contemporary features such as the Radio Facility and Diversion Dam. The map captures the rugged interior of the San Bernardino National Forest, where steep drainages like Mill Creek Canyon and Sawmill Canyon converge. Local history and resource extraction are marked by the Mill Creek Mine (Quarry) and the Penstock Powerhouse near Big Oaks Flat.

Mountaineering landmarks like San Gorgonio Mtn, Jepson Peak, and The Tarn are detailed alongside a network of trails, including the Sky High Trail. To the south, the Morongo Indian Reservation boundary meets the high ridges, while the northern reaches include Heart Bar State Park and the distinct Ten Thousand Foot Ridge. Small clearings and seasonal water sources like South Fork Cabin and High Meadow Springs indicate the area's use as a backcountry sanctuary.