"Field of wildflowers" by Intermountain Forest Service, USDA Region 4 Photography , public domain
US Topo 7.5-minute
ID Big Grassy 2020
US Topo 7.5-minute map of Big Grassy Quadrangle in Fremont County, Idaho. Published by the U.S. Geological Survey (USGS).
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U.S. Geological Survey (USGS), March 2020