
The Lost River Range dominates the eastern landscape of this Custer County quadrangle, where the high peaks of the Challis National Forest give way to the broad Thousand Springs Valley below. This survey captures a terrain defined by its water sources, from the alpine Merriam Lake and Pass Lake to the valley-floor network of Thousand Springs Creek and the Big Lost River. The presence of the Chilly Canal and various ranch roads, such as San Felipe Ranch Rd, illustrates the intersection of wild mountain topography with the irrigation and grazing needs of the valley. Local landforms like Barton Flats and the Cedar Creek Bar provide specific markers for those tracing family land use or local history in this part of Idaho. Notable landmarks like Whiskey Springs and Coyote Spring remain vital points of reference in this high-altitude environment.
30 named features on this map. Tap any name to fly to it.
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This is the sole edition of this map. No revisions or reprints were ever made.
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