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2017 Map of Porphyry Reef

Name: 2017 Topographic Map of Porphyry Reef
Creator: U.S. Geological Survey
Published: 2017
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 2017

About this map

Porphyry Reef and Washboard Reef anchor this high-altitude landscape where the boundaries of Flathead National Forest and Lewis and Clark National Forest meet. The terrain is defined by dramatic geological formations like Corrugate Ridge and Wapiti Ridge, while significant mountain passes such as Teton Pass and Sun River Pass provide critical historical routes through the Continental Divide. These passes historically facilitated movement between the North Fork Sun River drainage and the western slopes.

Water systems originate from high basins, including the headwaters of the West Fork North Fork Teton River and numerous creeks like Bowl Creek and Wrong Creek. Several alpine meadows, or parks, are distributed across the quadrangle, including McDonald Park and Grizzly Park. The presence of a dedicated Pack Trail highlights the primitive and protected nature of this wilderness area, where transportation remains tied to traditional backcountry methods.