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1989 Map of Mac Donald Pass
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1989 Map of Mac Donald Pass

USGS Topo · Published 1989

About this map

The Continental Divide snake-like through this portion of the Helena National Forest, marking the dramatic split between the Powell and Lewis and Clark county lines. This late-twentieth-century landscape is defined by its mining heritage and transit corridors, featuring a high concentration of mineral exploration sites such as the Third Term Mine, numerous Prospect pits, and an Open Pit Mine. The passage through the mountains is anchored by MacDonald Pass and Priest Pass, historical transit points that continue to support infrastructure like Radio Towers and a network of 4wd tracks. Recreational and tourist footprints are visible at Frontier Town and the Cromwell-Dixon Campground, while the hydrology of the area is mapped through complex drainages including Uncle George Creek and Little Flume Gulch.

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Map Details

Date Portrayed1989
Date Published1989
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22.1 x 26.9 inches

Editions of this 1989 Mac Donald Pass Map

Historical Maps of Forest Heights Through Time

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain