Loading map...

1988 Map of Illinois Peak

Name: 1988 Topographic Map of Illinois Peak
Creator: U.S. Geological Survey
Published: 1988
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1988

About this map

The high Bitterroot Divide defines this 1988 survey, marking the state line between Shoshone County, Idaho, and Mineral County, Montana. This high-altitude landscape is dominated by the intersecting boundaries of the Lolo National Forest, St Joe National Forest, and Clearwater National Forest. Exploration and extraction have left a clear mark on the terrain, evidenced by several mining sites like the Gildersleeve Mine, Amador Mine, and Cinkers Mine, alongside numerous unnamed prospects and adits concentrated around Snowshoe Gulch.

Remote outposts such as La Casse Camp appear alongside established routes like the St Joe Trail, which follows the upper reaches of the St Joe River. The map highlights a network of drainage systems, from the headwaters of the Clearwater River North Fork to the steep Rambler Falls. Significant peaks including Illinois Peak, Graves Peak, and Gold Crown Peak stand as prominent landmarks for those tracing historical backcountry trails or mining claims.