
The Big Lost River meanders across the southern reach of this Custer County landscape, defining the transition from the high peaks of the Lost River Range to the wide expanse of Barton Flats. This 1967 field-checked survey highlights a high-altitude wilderness within the Challis National Forest, where alpine features like Merriam Lake and Pass Lake sit tucked away in the upper elevations. The eastern topography is defined by sharp vertical relief, with Elkhorn Canyon, Vance Gulch, and Sawmill Gulch cutting deep into the mountainside.
29 named features on this map. Tap any name to fly to it.
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3 editions found
1935 · MacKay
USGS Topo · 1:96,000
1935 · Borah Peak
USGS Topo · 1:125,000
1938 · Borah Peak
USGS Topo · 1:125,000
1940 · Mackay
USGS Topo · 1:62,500
1955 · Dubois
USGS Topo · 1:250,000
1955 · Idaho Falls
USGS Topo · 1:250,000
1958 · Dubois
USGS Topo · 1:250,000
1958 · Idaho Falls
USGS Topo · 1:250,000
1960 · Mackay
USGS Topo · 1:62,500
1960 · Copper Basin
USGS Topo · 1:62,500