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2023 Map of Thompson Reservoir

Name: 2023 Topographic Map of Thompson Reservoir
Creator: U.S. Geological Survey
Published: 2023
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2023

About this map

Thompson Reservoir dominates the high desert landscape of Lake County, where water resources shape the recreational and agricultural utility of the region. Situated within the Fremont National Forest, the reservoir is fed by Silver Creek and Guyer Creek, providing a central focal point for the surrounding Thompson Valley. The map detail reveals a specialized livestock-rearing landscape, evidenced by the presence of McCall Dipping Spring, a feature highlighting historical or active grazing practices in these upland meadows.

Local topography is defined by prominent basaltic features such as Brattain Ridge and Alder Spring Ridge, while the northern portion is carved by the Auger Valley. Public access and infrastructure are concentrated along the Trunk Road, which connects the East Bay Campground to various remote water sources like Toolbox Spring and Sycan Spring. This 2023 survey documents a remote pocket of Oregon where forest management, seasonal wetlands, and scattered springs create a rugged, sparsely populated backcountry environment.