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The BLM Salmon Field Office manages the 24,922 acre Eighteenmile Wilderness Study Area (WSA) in north-central Idaho. The landscape is remote, rugged and mountainous - moving from foothills to grassy meadows to the steep cliffs along the Continental Divide. The vegetation here varies from sagebrush-grass communities at lower elevations to forests of Douglas fir, lodgepole pine, and whitebark pine at the higher elevations. The WSA is a popular area for non-motorized big game hunting in the fall. Visitors also enjoy excellent opportunities for solitude and for hiking, backpacking, rockhounding and wildlife viewing. The Continental Divide National Scenic Trail follows a portion of the eastern border of the WSA, primarily between the Pass Creek and Chamberlain Creek drainages, while the geographic Continental Divide is the eastern boundary of a significant portion of the WSA.

Visitation Information

The Eighteenmile WSA lies approximately 15 miles south of Leadore Idaho and is east of Highway 93. There are a variety of primitive roads that provide access to the WSA from Highway 93. The WSA is primarily accessed from Clear Creek, Eighteenmile Creek, Divide Creek, Willow Creek, and Powder Horn Gulch.

Visitor Advisory

Access roads are dirt and require suitable clearance; however, the roads may be impassable when muddy conditions exist. Conditions of roads can change at any time due to weather. Drivers should avoid dirt roads during rain or snow. Drivers should be cautious following rain or snowmelt. There are no marked trails in this WSA. Visitors must possess knowledge and skill in cross country hiking and navigation.