Challis National Forest dominates this high-altitude terrain in Custer County, Idaho, where a network of seasonal routes and forest service roads provides access to the mountainous interior. The landscape is defined by deep drainage systems and named gulches including Big Hill Gulch, Cartwright Gulch, and Klug Gulch, reflecting the topographic character that long influenced local movement. Central to the map, Jeffs Flats sits as a prominent high-ground feature, while Slab Barn Lake offers a rare body of standing water among the numerous seasonal creeks like Pats Creek and Challis Creek. Historically significant corridors such as the Custer Motor Way and Mill Creek Road traverse the southern portion of the sheet, tracing the pathways of early 20th-century development and access to the region's interior resources.
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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 Lake
USGS Topo · 1:24,000
1963 · Bayhorse
USGS Topo · 1:24,000
1963 · Clayton
USGS Topo · 1:62,500
1963 · Lone Pine Peak
USGS Topo · 1:62,500