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2023 Map of Forbidden Peak

Name: 2023 Topographic Map of Forbidden Peak
Creator: U.S. Geological Survey
Published: 2023
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2023

About this map

Forbidden Peak anchors this high-elevation survey of the North Cascades, where the convergence of the Stephen Mather Wilderness and North Cascades National Park highlights a landscape dominated by permanent ice and alpine hydrology. The map details an intricate glacial system, including the McAllister Glacier, Klawatti Glacier, and Borealis Glacier, which feed into high-altitude water bodies like Klawatti Lake and Moraine Lake.

Human passage through this vertical terrain is marked by the Thunder Creek Trail and Fisher Creek/Easy Pass Trl, providing the only established routes through the steep drainages of Thunder Creek and McAllister Creek. Notable summits such as Primus Peak and Austera Peak define the ridges of the Skagit County interior, while the Boston Basin reflects the deep glacial carving characteristic of the American Alps.