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1956 Map of Grassy Lake Reservoir

Name: 1956 Topographic Map of Grassy Lake Reservoir
Creator: U.S. Geological Survey
Published: 1973
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1973

About this map

Yellowstone National Park and the surrounding wilderness of the Targhee National Forest and Teton National Forest meet at a high-elevation nexus of river headwaters and geothermal features. The landscape is defined by the Bechler River and its dramatic drop over Colonnade Falls and Iris Falls, leading into the wide Bechler Meadows. This mid-century survey documents the transition from the Pitchstone Plateau down through Cascade Corner, where numerous waterfalls like Union Falls and Ouzel Falls punctuate the drainage basins.

Human activity is concentrated along established wilderness routes such as the Bechler River Trail and the South Boundary Trail. While primarily a natural landscape, the map records industrial and management footprints, including the Lucky Lady Mine near Berry Creek and the infrastructure of the Grassy Lake Reservoir. Scattered outposts like Porter Ranch and various Patrol Cabin sites mark the limited points of permanent habitation in this remote corner of Wyoming.