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1991 Map of Allan Mountain
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1991 Map of Allan Mountain

USGS Topo · Published 1991

About this map

Allan Mountain stands as a prominent landmark along the border between Ravalli Co and Lemhi Co, marking a high point in the high country where the Bitterroot National Forest meets the Salmon National Forest. This 1991 provisional survey documents a landscape defined by sharp elevation changes and a complex drainage system, including Hughes Creek and the North Fork Salzer Creek. For researchers, the map reveals specific signs of historic resource extraction, notably a Mine Shaft and several Prospect sites located near the upper reaches of Allan Creek. High-altitude water sources like Burrell Lake, Allan Lake, and Bear Wallow Spring are interspersed throughout the timbered slopes. The presence of primitive routes like the (Pack) Trail and Ax Park Way underscores the area's isolation and its historical use for pack animal transit across the Montana-Idaho state line.

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Map Details

Date Portrayed1991
Date Published1991
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.8 inches

Editions of this 1991 Allan Mountain Map

Historical Maps of Ravalli County Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain