Henry M. Jackson Wilderness is a federally designated wilderness of 103,297 acres in Washington’s central Cascades, spanning parts of the Snoqualmie, Mount Baker, and Wenatchee national forests. Established by the 1984 Washington Wilderness Act and named for U.S. Senator Henry M. Jackson, it includes rugged slopes, narrow ridges, about 30 lakes, and forests that rise into subalpine and alpine meadows. Long before federal protection, Indian trails and later exploratory parties crossed this country, and mining claims remain within its boundaries. The Pacific Crest National Scenic Trail and other routes connect it to a broader network of North Cascades wildlands, habitat, watersheds, and mountain passes.