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1991 Map of Allan Mountain, 1995 Print
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1991 Map of Allan Mountain

USGS Topo · Published 1995

About this map

Allan Mountain dominates the high-altitude topography of the Northern Rockies, where the Bitterroot National Forest meets the Salmon National Forest. This rugged terrain is defined by the Montana-Idaho state line and the Ravalli-Lemhi County Divide, marking a remote and sparsely settled wilderness area in the early 1990s. The landscape is carved by numerous drainages, including Hughes Creek and Twin Creek, with narrow ridges like Butcherknife Ridge separating steep mountain slopes. Evidence of geologic exploration appears in the eastern sector near Ditch Creek, where a Mine Shaft and several Prospect labels indicate small-scale mining activity. For the researcher, the map preserves old forest landmarks such as Salzer Bar and a network of named water sources like Tincup Spring and Bear Wallow Spring, characteristic of the region's high-country resource management.

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Map Details

Date Portrayed1991
Date Published1995
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.8 inches

Editions of this 1991 Allan Mountain Map

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain