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2011 Map of Mount Jackson

Name: 2011 Topographic Map of Mount Jackson
Creator: U.S. Geological Survey
Published: 2011
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2011

About this map

Mount Jackson stands at the center of this high-altitude landscape in Flathead County, where the Continental Divide separates significant glacial systems. This 2011 survey documents the state of the Jackson Glacier, Blackfoot Glacier, and the smaller Pumpkin Glacier before years of continued recession. The terrain is defined by extreme verticality, from the high Gunsight Pass down to the basins of Gunsight Lake and Harrison Lake.

A network of drainage systems, including the Saint Mary River and the headwaters of Nyack Creek, originates among these peaks. Notable landmarks like Siksika Falls and Lake Ellen Wilson provide essential orientation points for understanding the hydrologic patterns of the region. The map preserves the specific boundaries of these permanent ice fields and alpine lakes at the start of the 21st century.