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1990 Map of Day

Name: 1990 Topographic Map of Day
Creator: U.S. Geological Survey
Published: 1990
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1990

About this map

Day serves as a central reference point in this corner of the California high country, situated where the boundaries of Modoc, Shasta, and Lassen counties converge. The landscape is defined by the massive Big Valley Mountains, which dominate the central and southern portions of the map. High-elevation peaks such as Widow Mountain and Jimmerson Mountain overlook a network of seasonal water sources and basins, including Sugar Pine Basin and Widow Valley.

Evidence of the region's industrial and infrastructure history is found in the Old Railroad Grade tracing through the eastern valleys and a Cinder Pit to the south. The presence of the Widow Mountain Radio Facility highlights the mountain's strategic importance for communications, while scattered water features like Hamlin Springs and Indian Reservoir reflect the necessary management of resources within the Modoc National Forest and Shasta National Forest.