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1982 Map of Blackburn Canyon

Name: 1982 Topographic Map of Blackburn Canyon
Creator: U.S. Geological Survey
Published: 1982
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1982

About this map

The San Bernardino National Forest dominates this mountain landscape, defined by the sharp descent from Blackburn Ridge and Rouse Ridge into the canyon systems of the San Jacinto River. In the early 1980s, this area served as a critical intersection of water management and forest service operations, anchored by the Cranston FS Station and a network of technical sites including a Gaging Station and a Lookout Tower Radio Facility atop Red Mountain.

Remote land use is visible through the Toll Road winding toward Oak Cliff and the inclusion of the San Jacinto State Game Refuge. Small-scale water sources like Halfway Spring and Bautista Spring provide essential points of interest for historical land management researchers. The map also traces the Alessandro Trail and Rouse Ridge Road, reflecting the recreational and service infrastructure that connected these high ridges to the surrounding valley.