The Wild Sky Wilderness is a 106,577-acre (431 km2) wilderness area in the western Cascade Range of Washington state. The wilderness is within the Mount Baker-Snoqualmie National Forest north of the U.S. Highway 2 towns of Index and Skykomish. The wilderness flanks, but does not include, the North Fork Skykomish River and the Beckler River. The Henry M. Jackson Wilderness is adjacent to the east and northeast.