Located in the Mt. Baker-Snoqualmie and WenatcheeNational Forests.

The Henry M. Jackson Wilderness, created by the 1984 Washington Wilderness Act, is located adjacent to the southwest corner of the Glacier Peak Wilderness. This 102,673-acre area is northwest of Stevens Pass on Highway 2 and northeast of the town of Skykomish. While this Wilderness straddles the Cascade Mountain Range, most of it is in the westside ecotype. The vegetation includes cedars, Douglas-fir, true firs, spruce, western and mountain hemlock, and at higher elevations, alpine meadows.

The terrain is rugged, with steep slopes and finger ridges dissected by small intermittent or permanent drainages. Streams in the northern portion of this area drain into the Sauk River, while the southern portion drains into the Skykomish River. Main features of this area include Cady Creek Ridge and Creek. The Pacific Crest National Scenic Trail traverses the southern portion of the Wilderness. The area is rich in mining history with several acres of patented mining claims within its borders.

This area contains approximately 30 lakes which receive moderate fishing. Cross-Cascade Indian trails paralleled the Little Wenatchee River and provided routes for later exploring parties such as the 1860 E.F. Cady party for whom Cady Pass and Creek were named.