
The Snake River defines the southeastern corner of this high-elevation terrain, where deep drainage systems like Lightning Creek and Horse Creek carve through the landscape. This 2011 survey illustrates the infrastructure of the U.S. Forest Service in the Hells Canyon vicinity, including the Hat Point Lookout Tower and the remote Horse Creek Cabin. Navigation across the high ridges is facilitated by the Snake River View Rd and Hat Point Rd, which lead to critical vantage points such as Granny View Point and the Horse Creek Viewpoint. Smaller landmarks like Sacajawea Spring and Hoodoo Spring provide rare water sources along the steep slopes of Grizzly Ridge and Summit Ridge. The presence of the Memaloose Airstrip and Warnock Corral highlights the area's history as a working landscape for both aviation and ranching within the national forest.
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This is the sole edition of this map. No revisions or reprints were ever made.
1922 · He Devil
USGS Topo · 1:48,000
1954 · Imnaha
USGS Topo · 1:62,500
1954 · Kernan Point
USGS Topo · 1:62,500
1954 · Harl Butte
USGS Topo · 1:62,500
1955 · Grangeville
USGS Topo · 1:250,000
1957 · He Devil
USGS Topo · 1:62,500
1959 · Grangeville
USGS Topo · 1:250,000
1980 · Grangeville
USGS Topo · 1:100,000
1987 · Riggins
USGS Topo · 1:100,000
1990 · Imnaha
USGS Topo · 1:24,000