
The Salmon River cuts through this high-altitude landscape of central Idaho, defining the eastern edge of Round Valley as it flows past the town of Challis. This late 1980s provisional survey shows a community tied to the land and the water, featuring infrastructure like the Challis Airport and Sewage Disposal Ponds alongside recreation and resource extraction. The area's geological and thermal activity is evidenced by Challis Hot Springs and a Gravel Pit near the riverbanks.
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This is the sole edition of this map. No revisions or reprints were ever made.
1929 · Bayhorse
USGS Topo · 1:125,000
1956 · Challis
USGS Topo · 1:62,500
1956 · Twin Peaks
USGS Topo · 1:62,500
1957 · Challis
USGS Topo · 1:250,000
1960 · Challis
USGS Topo · 1:250,000
1963 · Challis
USGS Topo · 1:250,000
1963 · Bayhorse
USGS Topo · 1:24,000
1963 · Little Antelope Flat
USGS Topo · 1:24,000
1963 · Clayton
USGS Topo · 1:62,500
1963 · Lone Pine Peak
USGS Topo · 1:62,500