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2017 Map of Porcupine Lake

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

USGS Topo · Published 2017

About this map

Targhee National Forest dominates this section of eastern Idaho, where the high country transitions from timbered ridges into a complex network of agricultural irrigation. The Fall River serves as a primary hydrological artery, supporting man-made infrastructure like the Yellowstone Canal, Marysville Canal, and the Yellowstone Ditch. These waterways represent the vital intersection of the region's natural river systems and its mid-20th-century ranching development.

Evidence of early land management and back-country activity is found at Porcupine GS and the prominent Ashton-Flagg Ranch. The landscape is etched with historical draws and meadows, such as Moose Draw and Bear Meadow, alongside distinctive water bodies like Porcupine Lake and Bear Lake. Further south, the map details numerous named drainages including Squirrel Cr and Conant Cr, providing a clear record of the watershed before contemporary land use changes.