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1963 Map of Mt Lyall

Name: 1963 Topographic Map of Mt Lyall
Creator: U.S. Geological Survey
Published: 1965
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1965

About this map

Okanogan National Forest covers this high-elevation landscape in the mid-1960s, defined by its intricate system of ridges and glacial features. The Cascade Crest Trail traverses the northern section, passing near Agnes Gorge and the headwaters of Agnes Creek. This era of the North Cascades is preserved here before modern designations, showing the primitive state of the wilderness where the Company Glacier feeds the southern drainages.

Major peaks such as Mt Lyall, Devore Peak, and Tupshin Peak dominate the topography, interspersed with remote water bodies like Battalion Lake and Lake Marie. The drainage patterns are clearly established by the Stehekin River in the northeast, which collects flow from high-mountain tributaries including Moon Creek and Sun Creek. The map provides an essential record for tracing historic backcountry routes through the Fourth of July Basin and along Sable Ridge.