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2024 Map of Porphyry Reef, 2024 Print
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2024 Map of Porphyry Reef

USGS Topo · Published 2024

About this map

The Bob Marshall Wilderness dominates this portion of the Montana Rockies, where the Sawtooth Range meets the high ridges of the Continental Divide. The landscape is defined by massive limestone escarpments such as Porphyry Reef and Washboard Reef, which create a complex drainage network for the North Fork Sun River and the West Fork North Fork Teton River. These watercourses have historically carved the primary routes through the mountains, marked here by high-elevation crossings like Teton Pass and Sun River Pass.

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Map Details

Date Portrayed2024
Date Published2024
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions24 x 29 inches

Editions of this 2024 Porphyry Reef Map

This is the sole edition of this map. No revisions or reprints were ever made.

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain