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2017 Map of Three Sisters

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

USGS Topo · Published 2017

About this map

The Saint Joe River cuts through the northern reaches of this Idaho panhandle landscape, carving the steep Skookum Canyon as it flows westward. Located within the St. Joe National Forest, this terrain is defined by a series of prominent summits and ridges, most notably the namesake Three Sisters group—comprising Little Sister Peak, Mid Sister Peak, and E Sister Peak. High-elevation basins like Sisters Basin sit tucked beneath these peaks, which served as critical landmarks for early forest management and fire lookout activities.

Industrial and recreational access is mapped through an extensive network of specialized routes, including the Avery-Timber Creek Rd and numerous off-highway vehicle tracks such as Bootleg OHV and Shoepack Extra OHV. The map details a hydrographic system of remote drainages, from Sisters Cr to Prospector Cr, that feed into the larger river valley. These names reflect the region's history of mineral exploration and timber harvesting along the Bitterroot Range.