
The Salmon River and Pahsimeroi River converge near the small settlement of Ellis, forming a vital waterway junction in the high country of Custer and Lemhi Counties. This 2024 survey details the topographic interface between the Lost River Range and the Pahsimeroi Mountains, where the broad Pahsimeroi Valley meets the narrowing canyons of the Salmon. The landscape is defined by deep drainages such as Cronks Canyon, Ennis Gulch, and Deer Gulch, which feed into the primary river systems. Road networks like Pahsimeroi Rd and Custer Rd follow these natural corridors, connecting ranching lands and remote landmarks like Eagle Rock. The map illustrates the contemporary configuration of this river-and-range environment, highlighting how the terrain dictates the placement of transit routes and small-scale habitation in this part of central Idaho.
28 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.
1955 · Dubois
USGS Topo · 1:250,000
1956 · May
USGS Topo · 1:62,500
1956 · Challis
USGS Topo · 1:62,500
1957 · Challis
USGS Topo · 1:250,000
1958 · Dubois
USGS Topo · 1:250,000
1960 · Challis
USGS Topo · 1:250,000
1962 · Allison Creek
USGS Topo · 1:24,000
1963 · Challis
USGS Topo · 1:250,000
1963 · Hat Creek
USGS Topo · 1:24,000
1963 · Wards Butte
USGS Topo · 1:24,000