The Salmon National Forest dominates this section of Lemhi County, where the steep topography of the Salmon River Mountains is carved by a network of drainage gulches. The Salmon River cuts through the canyon, its course shadowed by the historic Lewis and Clark Trl, reflecting the deep temporal layers of travel through this corridor. Irrigation infrastructure is visible on the lower elevations of the Big Flat, where the McNutt Ditch and Big Flat Ditch move water across the landscape toward agricultural holdings near the riverbank.
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This is the sole edition of this map. No revisions or reprints were ever made.
1950 · Salmon
USGS Topo · 1:62,500
1950 · Leesburg
USGS Topo · 1:62,500
1951 · Leesburg
USGS Topo · 1:62,500
1951 · Salmon
USGS Topo · 1:62,500
1955 · Dillon
USGS Topo · 1:250,000
1956 · Elk City
USGS Topo · 1:250,000
1957 · Dillon
USGS Topo · 1:250,000
1958 · Dillon
USGS Topo · 1:250,000
1960 · Elk City
USGS Topo · 1:250,000
1960 · Ulysses Mtn
USGS Topo · 1:62,500